Czechia
Opensignal is the independent global standard for analyzing consumers' connectivity experiences. Our industry reports are the definitive guide to understanding what happens when people use their mobile and broadband connections in their daily life.
Czechia
Opensignal is the independent global standard for analyzing consumers' connectivity experiences. Our industry reports are the definitive guide to understanding what happens when people use their mobile and broadband connections in their daily life.
Key Findings
Czechia's Best Network: T-Mobile
T-Mobile wins Opensignal's Best Network award in Czechia, supported by outright victories for Download Speed Experience, Consistent Quality and Coverage Experience, alongside joint wins for Reliability Experience and Time on Network. T-Mobile is also the most awarded operator in this report, winning or sharing 12 experience awards.
T-Mobile delivers the fastest speeds
T-Mobile is the fastest network in Czechia in this report, with the fastest Download Speed Experience at 67.2Mbps and Upload Speed Experience at 15.1Mbps. T-Mobile also delivers the fastest 5G speeds, recording average 5G Download Speed of 153.6Mbps and 5G Upload Speed of 32.5Mbps.
Best video streaming experience goes to T-Mobile
T-Mobile wins Video Experience outright with 71.6 points and also tops 5G Video Experience with 77 points. All three operators in Czechia place in the Very Good category for both awards, meaning users can typically stream at 1080p or better with satisfactory loading times and little stalling.
O2 has the widest 5G coverage and connects users to 5G more often
O2 wins the Time on 5G award with 26.4%, ahead of Vodafone (22.9%) and T-Mobile (19.8%). O2’s result has increased by six percentage points since the previous report. O2 also retains 5G Coverage Experience — a metric assessing the reach of its 5G network.
Mobile Experience Awards
Market Overview
In this report T-Mobile wins Opensignal's Best Network award in Czechia, and takes the largest awards haul with 12 wins (nine outright and three joint), followed by O2 and Vodafone with four recognitions each.
Since our last report published on Czechia in February 2025, the Czech mobile market has experienced several regulatory and competitive developments. In mid-2025, the government approved a Czech Telecommunications Office (CTU) 10-year spectrum strategy plan, aimed at optimizing its use to foster digital innovation. Separately, CTU has been actively supporting improved national mobile coverage – setting coverage obligationsfor operators, including along railway corridors.
A major coordinated industry initiative saw O2, T-Mobile and Vodafone sign a state-backed infrastructure sharing agreement to extend 5G coverage into rural and previously underserved “white spots” across the country.
In the current report we examine the mobile network experience of the three main mobile network operators in Czechia — O2, T-Mobile and Vodafone — over a period of 90 days starting on October 1, 2025, and ending on December 29, 2025, to see how they fared.
Overall Experience
National Analysis
In the previous report, T-Mobile and O2 shared the Video Experience award, but in this report T-Mobile wins outright with a score of 71.6 points on a 100-point scale, leading by around two points over second-placed O2 and Vodafone, whose scores are statistically tied at 68.6-69.7 points. T-Mobile’s, O2’s and Vodafone’s scores haven’t changed a significant amount since the previous report, and all operators place in the Very Good (68-78) category, meaning that our users are, on average, able to stream video at 1080p or better with satisfactory loading times and little stalling. Video Experience scores account for adaptive bitrate streaming (ABR), a technology that allows Opensignal to accurately represent users' real video experience including video streams up to 4K quality.
Definitions
Opensignal’s Video Experience quantifies the quality of video streamed to mobile devices by measuring real-world video streams over an operator's networks. The metric is based on an International Telecommunication Union (ITU) approach, built upon detailed studies which have derived a relationship between technical parameters, including picture quality, video loading time and stall rate, with the perceived video experience as reported by real people. To calculate video experience, we are directly measuring video streams from end-user devices and using this ITU approach to quantify the overall video experience for each operator on a scale from 0 to 100. The videos tested include a mixture of resolutions — including Full HD (FHD) and 4K / Ultra HD (UHD) — and are streamed directly from the world’s largest video content providers.
In addition to Video Experience, we report on the following metrics related to video experience:
- 5G Video Experience: The average Video Experience of Opensignal users when they were connected to an operator’s 5G network.
- Video Experience – 5G Users: The average Video Experience of Opensignal users with a 5G device and a 5G subscription across an operator's networks. It factors in 2G, 3G, 4G and 5G video experience along with the availability of each technology.
- 4G Video Experience: The average Video Experience of Opensignal users on an operator's 4G network.
- 3G Video Experience: The average Video Experience of Opensignal users on an operator’s 3G network.
National Analysis
In the previous report, T-Mobile and O2 jointly won the Games Experience award, but in this report all operators share the award after achieving statistically tied scores of 83.4-84.5 points on a 100-point scale. Since the last report, Vodafone’s score has increased by two points, while T-Mobile’s and O2’s scores have not changed a significant amount. All operators place in the Good (75-85) category, meaning that most users deem the experience acceptable, gameplay is generally controllable, and users typically receive immediate feedback between their actions and in-game outcomes, with most users not experiencing a delay between their actions and the game.
Definitions
Opensignal’s Games Experience measures how mobile users experience real-time multiplayer mobile gaming on an operator’s network. Measured on a scale of 0-100, it analyzes how our users’ multiplayer mobile gaming experience is affected by mobile network conditions including latency, packet loss and jitter.
Games Experience quantifies the experience when playing real-time multiplayer mobile games on mobile devices connected to servers located around the world. The approach is built on several years of research quantifying the relationship between technical network parameters and the gaming experience as reported by real mobile users. These parameters include latency (round trip time), jitter (variability of latency) and packet loss (the proportion of data packets that never reach their destination). Additionally, it considers multiple genres of multiplayer mobile games to measure the average sensitivity to network conditions. The games tested include some of the most popular real-time multiplayer mobile games (such as Fortnite, Pro Evolution Soccer and Arena of Valor) played around the world.
Calculating Games Experience starts with measuring the end-to-end experience from users’ devices to internet end-points that host real games. The score is then measured on a scale from 0 to 100.
In addition to Games Experience, we report on the following metrics related to games experience:
- 5G Games Experience: The average Games Experience of Opensignal users when they were connected to an operator’s 5G network.
- Games Experience – 5G Users: The average Games Experience of Opensignal users with a 5G device and a 5G subscription across an operator's networks. It factors in 2G, 3G, 4G and 5G games experience along with the availability of each technology.
- 4G Games Experience: The average Games Experience of Opensignal users on an operator's 4G network.
- 3G Games Experience: The average Games Experience of Opensignal users on an operator's 3G (e.g. UMTS/HSPA or CDMA 1X EV-DO) network.
National Analysis
In the previous report, T-Mobile won the Download Speed Experience award, and in this report it retains the award outright with a score of 67.2Mbps, leading second-placed O2 by 23Mbps (44Mbps). Vodafone ranks third with 24.6Mbps. Since the last report, T-Mobile’s score has increased by 9Mbps, Vodafone’s has decreased by 5Mbps, and O2’s score hasn’t changed a significant amount.
Definitions
Measured in Mbps, Download Speed Experience represents the typical everyday speeds a user experiences across an operator’s mobile data networks.
In addition to Download Speed Experience, we report on the following metrics related to download speeds:
- 5G Download Speed: The average download speed observed by Opensignal users with active 5G connections.
- Download Speed Experience – 5G Users: The average download speeds experienced by Opensignal users with a 5G device and a 5G subscription across an operator’s networks. It factors in 2G, 3G, 4G, and 5G download speeds along with the availability of each technology.
- 4G Download Speed: The average downlink speed observed by Opensignal users when they were connected to 4G.
- 3G Download Speed: The average downlink speed observed by Opensignal users when they were connected to 3G (e.g. UMTS/HSPA or CDMA 1X EV-DO).
National Analysis
In the previous report, T-Mobile and O2 shared the Upload Speed Experience award, but in this report T-Mobile takes the award outright with a score of 15.1Mbps, leading second-placed O2 by 2Mbps (13.1Mbps), while Vodafone ranks third on 12.1Mbps. Compared with the last report, O2’s score has decreased by 4Mbps, and both Vodafone’s and T-Mobile’s scores have decreased by 2Mbps.
Definitions
Upload Speed Experience measures the average upload speeds for each operator observed by our users across their mobile data networks. Typically upload speeds are slower than download speeds, as current mobile broadband technologies focus resources on providing the best possible download speed for users consuming content on their devices. As mobile internet trends move away from downloading content to creating content and supporting real-time communications services, upload speeds are becoming more vital and new technologies are emerging that boost upstream capacity.
In addition to Upload Speed Experience, we report on five supporting metrics related to upload speeds:
- 5G Upload Speed: The average upload speed observed by Opensignal users with active 5G connections.
- Upload Speed Experience – 5G Users: The average upload speeds experienced by Opensignal users with a 5G device and a 5G subscription across an operator’s networks. It factors in 2G, 3G, 4G, and 5G upload speeds along with the availability of each technology.
- 4G Upload Speed: The average uplink speed observed by Opensignal users when they were connected to 4G.
- 3G Upload Speed: The average uplink speed observed by Opensignal users when they were connected to 3G (e.g. UMTS/HSPA or CDMA 1X EV-DO).
5G Experience
National Analysis
In the previous report, T-Mobile and O2 jointly won the 5G Video Experience award, but in this report T-Mobile takes the award outright with a score of 77 points on a 100-point scale, leading by around two points over second-placed O2 and Vodafone, whose scores are statistically tied at 74.6-74.9 points. Since the last report, O2’s score has decreased by two points, while T-Mobile’s and Vodafone’s scores haven’t changed a significant amount. All operators place in the Very Good (68-78) category, meaning that our users are, on average, able to stream video at 1080p or better with satisfactory loading times and little stalling. 5G Video Experience scores account for adaptive bitrate streaming (ABR), a technology that allows Opensignal to accurately represent users' real video experience including video streams up to 4K quality.
Definitions
5G Video Experience quantifies the quality of mobile video experienced by Opensignal users on real-world video streams when they were connected to 5G. The metric is based on an International Telecommunication Union (ITU) approach, built upon detailed studies which have derived a relationship between technical parameters, including picture quality, video loading time and stall rate, with the perceived video experience as reported by real people. To calculate 5G Video Experience, we are directly measuring video streams from end-user devices and using this ITU approach to quantify the video experience observed by our users on each operator’s 5G network on a scale from 0 to 100. The videos tested include a mixture of resolutions — including Full HD (FHD) and 4K / Ultra HD (UHD) — and are streamed directly from the world’s largest video content providers.
National Analysis
In the previous report, T-Mobile and O2 jointly won the 5G Games Experience award. In this report, O2 and Vodafone take the award jointly, with statistically tied scores of 90.8-91.5 points on a 100-point scale and a lead of around one point over third-placed T-Mobile’s 90 points. Since the last report, Vodafone’s score has increased by one point, T-Mobile’s score has decreased by one point, and O2’s score hasn’t changed a significant amount. All operators place in the Excellent (85 or above) category, meaning the vast majority of users deem this network experience acceptable, nearly all users feel like they have control over the game and receive immediate feedback on their actions, and there is not a noticeable delay in almost all cases.
Definitions
5G Games Experience measures how mobile users experience real-time multiplayer mobile gaming on an operator's 5G network. It analyzes how our users’ multiplayer mobile gaming experience was affected by mobile network conditions including latency, packet loss and jitter. 5G Games Experience for each operator is calculated on a scale from 0 to 100.
5G Games Experience quantifies the experience when playing real-time multiplayer mobile games on mobile devices connected to servers located around the world. The approach is built on several years of research quantifying the relationship between technical network parameters and the gaming experience as reported by real mobile users. These parameters include latency (round trip time), jitter (variability of latency) and packet loss (the proportion of data packets that never reach their destination). Additionally, it considers multiple genres of multiplayer mobile games to measure the average sensitivity to network conditions. The games tested include some of the most popular real-time multiplayer mobile games (such as Fortnite, Pro Evolution Soccer and Arena of Valor) played around the world. Calculating 5G Games Experience starts with measuring the end-to-end experience from users’ devices to internet end-points that host real games.
National Analysis
T-Mobile, which won the 5G Download Speed award in the previous report, retains the award in this report, winning outright with 153.6Mbps and leading second-placed O2 by 54Mbps (99.3Mbps), while Vodafone ranks third with 54.1Mbps. Since the last report, T-Mobile’s score has increased by 24Mbps, Vodafone’s has decreased by 7Mbps, and O2’s score has not changed by a significant amount.
Definitions
5G Download Speed shows the average download speed experienced by Opensignal users across an operator’s 5G network. 5G Download Speed for each operator is calculated in Mbps (Megabits per second).
National Analysis
After winning the 5G Upload Speed award in the previous report, T-Mobile takes the award outright again in this report with a score of 32.5Mbps, leading by around 10Mbps over second-placed O2 and Vodafone, whose scores are statistically tied at 22.1-23Mbps. Compared with the previous report, O2's score has decreased by 9Mbps, T-Mobile's score has decreased by 6Mbps, and Vodafone's score has decreased by 3Mbps.
Definitions
5G Upload Speed measures the average upload speeds experienced by Opensignal users across an operator’s 5G network. 5G Upload Speed for each operator is calculated in Mbps (Megabits per second).
Coverage
National Analysis
After winning the Coverage Experience award in the previous report, T-Mobile retains the award in this report, taking it outright with a score of 9.8 points on a 10-point scale and a lead of less than one point over second-placed O2 on 9.7 points, while Vodafone ranks third with 9.4 points. The scores for T-Mobile, O2 and Vodafone have not changed significantly since the previous report.
Definitions
The Opensignal Coverage Experience metric measures the extent of mobile networks in the places people live, work and travel. The metric represents the experience users receive as they travel around areas where they would reasonably expect to find coverage.
Traditional coverage metrics typically estimate either a percentage of land area covered, or a percentage of population covered; often neither will be an accurate measurement of the true user expectation and experience. In many markets there are areas where neither population density nor geographic area reflect the importance of coverage to users. For example, in a large mountain range most users will not expect coverage in the wilderness, but poor coverage in the relatively small area of a ski resort is critical for the enjoyment of a holiday. Estimates based purely on population give undue significance to coverage in the most densely populated areas.
Coverage Experience measures geographic coverage of populated areas and therefore more accurately reflects the coverage expectations and experience of typical users. It can give a result that is somewhat different to traditional estimates based on either geographic or population measures. The metric uses a scale from 0 to 10.
National Analysis
In the previous report, O2 won the 5G Coverage Experience award, and in this report it retains the award outright with a score of 5.59 points on a 10-point scale, leading second-placed T-Mobile by fraction of a point, with T-Mobile scoring 5.55 points. Vodafone remains in third place with 5.2 points. Since the last report, scores have risen across the board, with O2, T-Mobile, and Vodafone each increasing by one point.
Definitions
The Opensignal Coverage Experience metric measures the extent of mobile networks in the places people live, work and travel. The metric represents the experience users receive as they travel around areas where they would reasonably expect to find coverage.
Traditional coverage metrics typically estimate either a percentage of land area covered, or a percentage of population covered; often neither will be an accurate measurement of the true user expectation and experience. In many markets there are areas where neither population density nor geographic area reflect the importance of coverage to users. For example, in a large mountain range most users will not expect coverage in the wilderness, but poor coverage in the relatively small area of a ski resort is critical for the enjoyment of a holiday. Estimates based purely on population give undue significance to coverage in the most densely populated areas.
Coverage Experience measures geographic coverage of populated areas and therefore more accurately reflects the coverage expectations and experience of typical users. It can give a result that is somewhat different to traditional estimates based on either geographic or population measures. The metric uses a scale from 0 to 10.
5G Coverage Experience shows the proportion of places Opensignal users with a 5G device and a 5G subscription had an active 5G connection.
National Analysis
In the previous report, the Time on Network award was shared jointly by T-Mobile, O2 and Vodafone, but in this report T-Mobile and Vodafone take the award together with statistically tied scores of 96.6-97.8%, leading third-placed O2 on 96.5% by around one percentage point. Since the previous report, Vodafone’s score has increased by two percentage points, while T-Mobile’s and O2’s scores have not changed a significant amount. Prior to Q4 2025, Time on Network was referred to as Availability in Opensignal reports.
Definitions
Our time on network and availability metrics are not measures of a network’s geographical extent. They won’t tell you whether you are likely to get a signal if you plan to visit a remote rural or nearly uninhabited region. Instead, they measure what proportion of time people have a network connection, in the places they most commonly frequent — something often missed by traditional coverage metrics. Looking at when users have a connection rather than where, provides us with a more precise reflection of the true user experience.
We also keep track of the instances that leave mobile users most frustrated: when there is no signal to connect to at all. The most common dead zones users struggle with occur indoors. As most of our time on network data is collected indoors (as that’s where users spend most of their time), we’re particularly astute at detecting areas of zero signal.
Our time on network and availability metrics take a user-centric, time-based approach that complements the user-centric and geographical-based methodology used by our reach metrics.
Time on Network shows the proportion of time all Opensignal users on an operator’s network had either a 3G, 4G or 5G connection.
National Analysis
After O2 and Vodafone shared the Time on 5G award in the previous report, O2 now wins outright in this report with a score of 26.4%, leading second-placed Vodafone by three percentage points (22.9%), while T-Mobile ranks third on 19.8%. O2’s score has risen by six percentage points since the previous report, while T-Mobile’s and Vodafone’s scores have not changed by a significant amount. Time on 5G measures the percentage of time users with a 5G device are actively connected to a 5G network bearer, indicating how often data traffic is actually carried over 5G rather than 4G. Prior to Q4 2025, Time on 5G was referred to as 5G Availability in Opensignal reports.
Definitions
Our time on network and availability metrics are not measures of a network’s geographical extent. They won’t tell you whether you are likely to get a signal if you plan to visit a remote rural or nearly uninhabited region. Instead, they measure what proportion of time people have a network connection, in the places they most commonly frequent — something often missed by traditional coverage metrics. Looking at when users have a connection rather than where, provides us with a more precise reflection of the true user experience.
We also keep track of the instances that leave mobile users most frustrated: when there is no signal to connect to at all. The most common dead zones users struggle with occur indoors. As most of our time on network data is collected indoors (as that’s where users spend most of their time), we’re particularly astute at detecting areas of zero signal.
Our time on network and availability metrics take a user-centric, time-based approach that complements the user-centric and geographical-based methodology used by our reach metrics.
Time on 5G shows the proportion of time Opensignal users with a 5G device and a 5G subscription utilised an active 5G connection.
National Analysis
This report introduces the 5G Availability award metric, which was not included in the previous report. T-Mobile wins the award outright with a score of 88.9%, leading by around five percentage points over second-placed O2 and Vodafone, whose scores are statistically tied at 82.8-84.4%. 5G Availability measures the percentage of time users with a 5G device and subscription detect a 5G signal, regardless of whether their data traffic is actively using 5G or remains anchored on 4G. The metric’s definition was updated in Q4 2025 as part of a refinement of our metric framework.
Definitions
Our time on network and availability metrics are not measures of a network’s geographical extent. They won’t tell you whether you are likely to get a signal if you plan to visit a remote rural or nearly uninhabited region. Instead, they measure what proportion of time people have a network connection, in the places they most commonly frequent — something often missed by traditional coverage metrics. Looking at when users have a connection rather than where, provides us with a more precise reflection of the true user experience.
We also keep track of the instances that leave mobile users most frustrated: when there is no signal to connect to at all. The most common dead zones users struggle with occur indoors. As most of our time on network data is collected indoors (as that’s where users spend most of their time), we’re particularly astute at detecting areas of zero signal.
Our time on network and availability metrics take a user-centric, time-based approach that complements the user-centric and geographical-based methodology used by our reach metrics.
5G Availability shows the proportion of time Opensignal users with a 5G device and a 5G subscription had a 5G connection, whether or not it was used.
Consistency
National Analysis
After winning the Consistent Quality award in the previous report, T-Mobile retains the title in this report, taking the award outright with a score of 85.6% and a 10 percentage point lead over second-placed Vodafone on 75.1%, while O2 ranks third with 67.7%. Compared with the last report, scores have declined across all three operators: O2 is down 12 percentage points, Vodafone is down five percentage points, and T-Mobile is down one percentage point.
This metric measures whether the network is sufficient to support common mobile application requirements at a level that is ‘good enough’ for users to maintain (or complete) various typical demanding tasks on their devices, assessing experience indicators including download speed, upload speed, latency, jitter, packet loss, and time to first byte.
Definitions
Consistent Quality measures if the network is sufficient to support common mobile application requirements at a level that is ‘good enough’ for users to maintain (or complete) various typical tasks on their devices.
We combine different experience indicators such as download throughput, upload throughput, latency, jitter, packet discard, and time to first byte to calculate Consistent Quality. These components are evaluated against thresholds recommended by various more demanding common applications used for a range of common tasks.
To calculate the metric value, the proportion of tests that pass the requirements of Consistent Quality is multiplied by the test success ratio, which is the proportion of completed tests to all tests conducted. Tests that pass indicate that activities such as video calling, uploading an image to social media, or using smart home applications will be possible without noticeable lag or slowdown.
National Analysis
As in the previous report, T-Mobile and Vodafone jointly win Opensignal’s Reliability Experience award; in this report they are statistically tied with scores of 931-937 points on a 100-1000 point scale, leading third-placed O2 by around 113 points, with O2 scoring 821. Since the last report, O2’s score has decreased by 68 points, while T-Mobile’s and Vodafone’s scores have not changed a significant amount.
Opensignal’s Reliability Experience measures the ability of our users to connect to and successfully complete (basic) tasks on operators’ networks, based on % time connected — the proportion of time Opensignal users can successfully connect to a mobile network; Data Connectivity — the proportion of time when the network is available and the device can connect to the internet; Task completion — whether tasks initiated by the user’s device are completed; and Sufficiency — the probability that (basic) tasks will be executed sufficiently well for the user.
Definitions
Opensignal’s Reliability Experience measures the ability of Opensignal users to connect to and successfully complete (basic) tasks on communication service providers’ (CSP) networks. It analyzes how much Opensignal users’ experience is affected by the radio access and core network, along with issues that prevent them from connecting to the internet even if they have a connection to their CSP’s network. It also factors in users’ ability to successfully use lower performance applications including SD video, over-the-top voice calls and web browsing.
Related Analysis
Our Methodology
Collecting billions of individual measurements daily from over 100 million devices globally, Opensignal independently analyzes mobile and broadband user experience on every major network operator around the globe.
About Opensignal
Opensignal is the leading global provider of independent insights into consumers' connectivity experiences and choice of carrier. Our proprietary insights into mobile and broadband networks give operators the solutions they need to profitably compete and win, from executive level scorecards and public validation to pin-point level engineering analytics and consumer decision dynamics.
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Confidence Intervals
For every metric we calculate statistical confidence intervals indicated on our graphs. When confidence intervals overlap, our measured results are too close to declare a winner. In those cases, we show a statistical draw. For this reason, some metrics have multiple operator winners.
In our bar graphs we represent confidence intervals as boundaries on either sides of graph bars.
In our supporting-metric charts we show confidence intervals as +/- numerical values.
Why confidence intervals are vital in analyzing mobile network experience