Bulgaria

Mobile Network Experience Report
June 2022

Opensignal is the independent global standard for analyzing consumer mobile experience. Our industry reports are the definitive guide to understanding the true experience consumers receive on wireless networks.

Author: Sam Fenwick, Senior Analyst Data Collection Period: Mar 01 - May 29, 2022

Bulgaria

Mobile Network Experience Report
June 2022

Opensignal is the independent global standard for analyzing consumer mobile experience. Our industry reports are the definitive guide to understanding the true experience consumers receive on wireless networks.

Author: Sam Fenwick, Senior Analyst

Data Collection Period: Mar 01 - May 29, 2022

Key Findings

Users saw the fastest average 5G speeds on Vivacom’s network

Vivacom is the outright winner of the 5G Download Speed award. It clocked up an impressive score of 443.5 Mbps, 92.6 Mbps (26.4%) faster than A1’s 350.9 Mbps and more than double Yettel’s 200.8 Mbps. Vivacom’s score is an incredible 7.7 times faster than the average speeds seen by our Vivacom users across all generations of mobile technology (Download Speed Experience). A1 and Yettel’s 5G Download Speed Scores were 5.9 and 3.9 times faster, respectively, than their Download Speed Experience scores.

A1 comes top for Consistency

A1 is the outright winner of the two awards for consistent quality. It wins Excellent Consistent Quality with a score of 84.2% and a lead of 0.9 percentage points over second placed Yettel, with Vivacom slightly further behind with 80.6%. A1 places first for Core Consistent Quality with a score of 92.7%, two percentage points ahead of the immediate runner-up Vivacom. Excellent Consistency Quality is the percentage of users’ tests that met the minimum recommended performance thresholds to watch HD video, complete group video conference calls and play games. Core Consistent Quality uses the same approach but with thresholds for less demanding applications.

Yettel wins the 5G Video Experience award

Our users had their best experience when streaming video over 5G on Yettel’s network. Yettel wins 5G Video Experience with a score of 80.6 points on a 100 point scale, 3.4-6.1 points higher than Vivacom and A1’s statistically tied scores that were in the 74.5-77.2 point range.

Vivacom 5G users spent the most time connected to 5G

Vivacom is the outright winner of the 5G Availability award — our 5G users on its network spent 27.8% of their time with an active 5G connection, over 10 percentage points higher than A1 or Yettel 5G users, as these two operators have statistically tied scores of 17.5-17.7%. 5G Availability is an important measure of the mobile experience as the more time users are connected to 5G, the more they can benefit from the superior experience that 5G can provide.

A1 and Vivacom share the Download Speed Experience award

Our users on A1 and Vivacom’s networks saw the fastest — but statistically tied — average download speeds of 58-59.1 Mbps, around 7 Mbps faster than the 51.4 Mbps reported by Yettel users. As a result, A1 and Vivacom are joint winners of the Download Speed Experience award. However, Yettel and A1 share the Upload Speed Experience award with average upload speeds of 13-13.3 Mbps — with Vivacom in third place with 12 Mbps, as its upper confidence interval is less than A1’s lower confidence interval.

Mobile Experience Awards

June 2022, Bulgaria Report
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Market Overview

For the first time Opensignal presents 5G awards in Bulgaria, in addition to those for the Overall Experience of our users across all generations of mobile technology. Our Bulgarian users saw truly impressive speeds when connected to 5G networks — 200.8-443.5 Mbps, depending on their choice of operator, or 3.9-7.7 times faster than the overall speeds seen by our users.

While all five Overall Experience awards were shared by two or more operators, Yettel and Vivacom are the first Bulgarian operators to win the 5G Video Experience and 5G Download Speed awards outright, respectively. In addition, Vivacom is the winner of the 5G Availability award, with our 5G users on its network spending more than a quarter of their time with an active 5G connection. In fact, Vivacom has the largest haul of awards, due to its two outright wins and eight shared victories. Yettel is close behind, with the same number of joint wins but only one solo victory. While A1 has the smallest collection of awards, it still managed to be a joint winner for four out of five Overall Experience awards along with Availability and is the outright winner of both Consistency awards.

In this report, we’ve analyzed the mobile experience of our Bulgarian users across all three national operators — A1, Vivacom and Yettel (formerly Telenor) — over the 90 day period starting on March 1, 2022 and ending on May 29, 2022. Our Overall Experience results include measurements from 5G devices.

Overall Experience
5G Experience
Coverage
Consistency
Video Experience
Games Experience
Voice App Experience
Download Speed Experience
Upload Speed Experience
All Users
5G Users
Video Experience
in 0-100 points
A1
63.5
Vivacom
60.5
Yettel
64.0
0 17.5 35 52.5 70
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Video Experience – 5G Users
in 0-100 points
A1
69.0
Vivacom
70.7
Yettel
72.2
0 20 40 60 80
The brackets represent confidence intervals.
Read why confidence intervals are important.
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All Users
5G Users
Games Experience
in 0-100 points
A1
68.7
Vivacom
71.4
Yettel
69.6
0 19 38 57 76
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Games Experience – 5G Users
in 0-100 points
A1
67.7
Vivacom
76.2
Yettel
72.8
0 20 40 60 80
The brackets represent confidence intervals.
Read why confidence intervals are important.
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All Users
5G Users
Voice App Experience
in 0-100 points
A1
77.7
Vivacom
80.1
Yettel
79.3
0 21.5 43 64.5 86
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Voice App Experience – 5G Users
in 0-100 points
A1
77.1
Vivacom
81.8
Yettel
80.8
0 21.5 43 64.5 86
The brackets represent confidence intervals.
Read why confidence intervals are important.
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All Users
5G Users
Download Speed Experience
in Mbps
A1
59.1
Vivacom
58.0
Yettel
51.4
0 16.5 33 49.5 66
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Download Speed Experience – 5G Users
in Mbps
A1
132.5
Vivacom
175.1
Yettel
88.8
0 47.5 95 142.5 190
The brackets represent confidence intervals.
Read why confidence intervals are important.
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All Users
5G Users
Upload Speed Experience
in Mbps
A1
13.3
Vivacom
12.0
Yettel
13.0
0 4 8 12 16
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Upload Speed Experience – 5G Users
in Mbps
A1
15.6
Vivacom
18.4
Yettel
15.7
0 5 10 15 20
The brackets represent confidence intervals.
Read why confidence intervals are important.
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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.

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.

Definitions

Opensignal's Voice App Experience measures the quality of experience for over-the-top (OTT) voice services — mobile voice apps such as WhatsApp, Skype and Facebook Messenger — using a model derived from the International Telecommunication Union (ITU) approach for quantifying overall voice call quality and a series of calibrated technical parameters. This model characterizes the exact relationship between the technical measurements and perceived call quality. Voice App Experience for each operator is calculated on a scale from 0 to 100.

In addition to Voice App Experience, we report on the following metrics related to voice app experience:

  • 5G Voice App Experience: The average Voice App Experience of Opensignal users when they were connected to an operator’s 5G network.
  • Voice App Experience – 5G Users: The average Voice App 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 voice app experience along with the availability of each technology.
  • 4G Voice App Experience: The average Voice App Experience of Opensignal users on an operator's 4G network.
  • 3G Voice App Experience: The average Voice App Experience of Opensignal users on an operator's 3G (e.g. UMTS/HSPA or CDMA 1X EV-DO) network.

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).

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).

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5G Video Experience
5G Games Experience
5G Voice App Experience
5G Download Speed
5G Upload Speed
5G Video Experience
in 0-100 points
A1
74.5
Vivacom
77.2
Yettel
80.6
0 21.5 43 64.5 86
The brackets represent confidence intervals.
Read why confidence intervals are important.
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5G Games Experience
in 0-100 points
A1
64.4
Vivacom
81.8
Yettel
77.4
0 21.5 43 64.5 86
The brackets represent confidence intervals.
Read why confidence intervals are important.
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5G Voice App Experience
in 0-100 points
A1
78.5
Vivacom
83.1
Yettel
81.6
0 21.5 43 64.5 86
The brackets represent confidence intervals.
Read why confidence intervals are important.
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5G Download Speed
in Mbps
A1
350.9
Vivacom
443.5
Yettel
200.8
0 119 238 357 476
The brackets represent confidence intervals.
Read why confidence intervals are important.
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5G Upload Speed
in Mbps
A1
27.4
Vivacom
34.4
Yettel
32.2
0 10 20 30 40
The brackets represent confidence intervals.
Read why confidence intervals are important.
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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.

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.

Definitions

5G Voice App Experience quantifies the experience of Opensignal users when using over-the-top voice apps — such as WhatsApp, Skype and Facebook Messenger — on an operator’s 5G network. It uses a model derived from the International Telecommunication Union (ITU) approach for quantifying overall voice call quality and a series of calibrated technical parameters. This model characterizes the exact relationship between the technical measurements and perceived call quality. 5G Voice App Experience for each operator is calculated on a scale from 0 to 100.

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).

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).

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A1

Vivacom

Yettel

Availability
5G Availability
Availability
% of time
A1
97.4
Vivacom
97.8
Yettel
97.9
0 25 50 75 100
The brackets represent confidence intervals.
Read why confidence intervals are important.
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5G Availability
% of time
A1
17.7
Vivacom
27.8
Yettel
17.5
0 9 18 27 36
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Definitions

Our availability metrics are not a measure 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 availability 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 availability metrics take a user-centric, time-based approach that complements the user-centric and geographical-based methodology used by our reach metrics.

Availability shows the proportion of time all Opensignal users on an operator’s network had either a 3G, 4G or 5G connection.

Definitions

Our availability metrics are not a measure 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 availability 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 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 an active 5G connection.

The coverage maps show the locations where we received measurements from users connecting with 3G or better mobile service. Each map provides an indication of the areas in which it is possible to obtain mobile service from that mobile operator.

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Excellent Consistent Quality
Core Consistent Quality
Excellent Consistent Quality
% of tests
A1
84.2
Vivacom
80.6
Yettel
83.3
0 21.5 43 64.5 86
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Core Consistent Quality
% of tests
A1
92.7
Vivacom
90.7
Yettel
90.4
0 24 48 72 96
The brackets represent confidence intervals.
Read why confidence intervals are important.
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Definitions

Consistent Quality measures how often users’ experience on a network was sufficient to support common applications’ requirements. It measures download speed, upload speed, latency, jitter, packet loss, time to first byte and the percentage of tests attempted which did not succeed due to a connectivity issue on either the download or server response component.

The Consistent Quality metrics — Excellent Consistent Quality and Core Consistent Quality — are calculated using data from our sister company Tutela and uses its methodology, full details of which can be found here.

Excellent Consistent Quality is the percentage of users’ tests that met the minimum recommended performance thresholds to watch HD video, complete group video conference calls and play games.

Definitions

Consistent Quality measures how often users’ experience on a network was sufficient to support common applications’ requirements. It measures download speed, upload speed, latency, jitter, packet loss, time to first byte and the percentage of tests attempted which did not succeed due to a connectivity issue on either the download or server response component.

The Consistent Quality metrics — Excellent Consistent Quality and Core Consistent Quality — are calculated using data from our sister company Tutela and uses its methodology, full details of which can be found here.

Core Consistent Quality is the percentage of users’ tests that met the minimum recommended performance thresholds for lower performance applications including SD video, voice calls and web browsing.

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Related Analysis

Our Methodology

Collecting billions of individual measurements daily from over 100 million devices globally, Opensignal independently analyzes mobile user experience on every major network operator around the globe.

About Opensignal

Opensignal is the mobile analytics company committed to improving mobile connectivity across the globe. We are the independent authority for understanding the true experience consumers receive on wireless networks.

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