Serbia
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.
Serbia
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
Yettel wins Best Network in Serbia
Yettel wins Best Network, with outright wins for Consistent Quality, Time on Network and Coverage Experience, plus joint wins for Download Speed and Reliability Experience.
The most consistent network is with Yettel
Yettel wins Consistent Quality outright, while A1 and Yettel share Reliability Experience. A1 leads outright for 5G Reliability Experience.
Yettel leads on video and games
Yettel now wins both Video Experience and Games Experience outright, pulling ahead after previously sharing first place in both categories.
Yettel users stay connected more often
Yettel wins Time on Network, Coverage Experience and 5G Coverage Experience outright, showing its users connect more often and in more places.
Mts leads for 5G gaming and upload
Mts users enjoy Serbia’s best 5G Games Experience and fastest 5G Upload Speed.
Mobile Experience Awards
Market Overview
Yettel wins the Best Network award in Serbia, taking outright victories for Consistent Quality, Time on Network and Coverage Experience, while also sharing first place for Download Speed Experience and Reliability Experience.
A1 earns the Best 5G Network award thanks to its strong user experience across key 5G measures. It wins 5G Download Speed and 5G Reliability Experience outright, and shares first place for 5G Video Experience and Time on 5G.
In this report, we examine the mobile network experience of Serbia’s three main mobile network operators — A1, mts and Yettel — over the 90-day period from January 1, 2026, to March 31, 2026.
Overall Experience
National Analysis
Yettel now offers the best mobile video experience, winning the Video Experience award outright with a score of 73.8 points on a 100-point scale. This marks an improvement from the previous report, when Yettel and mts shared first place. Yettel leads by around three points over second-placed mts and A1, whose scores are statistically tied at 70.5-71.6 points. Since the last report, both Yettel's and A1's scores have increased by three points, while mts' score has not changed by 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.
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
Yettel now offers the best mobile games experience outright, winning the Games Experience award with 83.4 points on a 100-point scale and opening up a lead of around four points over second-placed mts and A1, whose statistically tied scores stand at 79.2-80.1 points. This marks a change from the previous report, when Yettel, mts and A1 shared first place. Since then, Yettel's score has risen by six points, A1's by three points, while mts' score has not changed significantly. All operators place in the Good (75-85) category, meaning most users find the experience acceptable, with generally controllable gameplay, immediate feedback between their actions and in-game outcomes, and little perceived delay between 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
Yettel and A1 now share first place for Download Speed Experience with statistically tied scores of 86.3-87.7Mbps, giving users the best network for downloading files and loading content, and holding a lead of around 21Mbps over third-placed mts' 65.6Mbps. Since the last report, this category has shifted from an outright win for A1 to a joint win, as Yettel's score rose by 34Mbps and A1's by 23Mbps, while mts also improved by 16Mbps.
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
A1 and Yettel now share first place for Upload Speed Experience with statistically tied scores of 17.9-18.8Mbps, giving them a lead of around 2Mbps over third-placed mts on 16.4Mbps. Since the last report, A1's score has risen by 4Mbps, Yettel's by 3Mbps and mts' by 2Mbps, resulting in Yettel moving from winning outright previously to a joint top position with A1.
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
All operators share first place for 5G Video Experience, with statistically tied scores of 76.6-77.2 points on a 100-point scale. All operators place in the Very Good (68-78) category, meaning our users are, on average, able to stream video at 1080p or better with satisfactory loading times and little stalling.
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
Mts now offers the best 5G mobile games experience, winning the 5G Games Experience award outright with a score of 86.4 points on a 100-point scale. This puts it around four points ahead of second-placed Yettel and A1, whose statistically tied scores range from 82.6 to 83 points. Mts places in the Excellent (85 or above) category, while Yettel and A1 rank one category lower in Good (75-85). An Excellent rating means the vast majority of users deem the network experience acceptable, with nearly all users feeling in control of the game, receiving immediate feedback on their actions, and noticing almost no delay. A Good rating means most users find the experience acceptable, with gameplay generally controllable, immediate feedback between actions and outcomes, and delays uncommon for most users.
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
A1 now leads on 5G download speeds, winning the award outright with 368.5Mbps. It finishes 69Mbps ahead of second-placed mts, which scores 299.8Mbps, while Yettel places third at 268.1Mbps.
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
mts now wins the 5G Upload Speed award outright, delivering the fastest 5G upload speeds with a score of 47Mbps. It leads second-placed Yettel and A1, whose statistically tied scores range from 37.6Mbps to 38.2Mbps, by around 9Mbps.
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
Yettel now offers the best coverage experience, winning the Coverage Experience award outright with 7.6 points on a 10-point scale. mts follows closely in second place with 7.5 points, less than one point behind, while A1 ranks third with 6.9 points. Since the last report, the scores for all three operators — mts, Yettel and A1 — have each increased by less than 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.
National Analysis
Yettel now delivers the best 5G coverage experience, winning the 5G Coverage Experience award outright with a score of two points on a 10-point scale. A1 follows in second place on 1.1 points, one point behind Yettel, while Mts ranks third with a score of 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
Yettel users are spending most time connected, winning the Time on Network award outright with a score of 99.3%, around two percentage points ahead of second-placed mts and A1, which are statistically tied on 96.5-97.2%. This result continues the pattern from the previous report, when Yettel also won the award, while Yettel's, mts' and A1's scores have not changed by a significant amount since then. 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
Yettel and A1 share first place for time with an active 5G connection, winning the Time on 5G award jointly with statistically tied scores of 16.5-19.2% and a lead of around three percentage points over third-placed mts’ 14.5%. 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
Yettel has the best 5G signal availability in this report, winning the 5G Availability award outright with a score of 65.7% and a lead of around nine percentage points over second-placed mts' and A1's statistically tied scores of 55.7-56.8%. 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 5G Availability metric’s definition was updated in Q4 2025 as part of 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
Yettel now delivers the best network for completing common mobile tasks reliably, winning the Consistent Quality award outright with a score of 84.1%, two percentage points ahead of second-placed A1 on 81.8%, while Mts ranks third at 81.3%. Compared with the last report, Mts' score has increased by four percentage points, while both Yettel's and A1's scores have risen by three percentage points. 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 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
Yettel and A1 share first place for Reliability Experience in this report, with statistically tied scores of 933-935 points on a 100-1000 point scale and a lead of around 33 points over third-placed mts’ 901 points. Since the previous report, A1’s score has increased by 38 points and mts’ by 19 points, while Yettel’s score has not changed by a significant amount. Opensignal’s Reliability Experience measures the ability of our users to connect to and successfully complete basic tasks on operators’ networks. It consists of the following components:
% 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
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.
National Analysis
A1 now has the most reliable 5G network experience, winning the 5G Reliability award outright with 977 points on a 100-1000 point scale. It leads second-placed Yettel and mts, which are statistically tied on 924-932 points, by around 49 points. 5G Reliability Experience measures how consistently users can complete everyday tasks while connected to 5G, reflecting how likely a 5G connection is to work reliably from start to finish rather than the likelihood of accessing 5G in the first place.
Definitions
Measures how consistently users can complete everyday tasks while connected to 5G. It does not reflect the likelihood of accessing 5G, but instead the probability that, once connected, a user can (1) establish a usable data session, including successful access to the internet beyond the radio link, (2) maintain that session without interruptions or drops, and (3) achieve sufficient quality for common applications such as web browsing, over-the-top voice, and video streaming – including services that require only modest performance rather than peak speeds. In short: if you are on 5G, how likely is your experience to work reliably from start to finish?
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