Bulgaria 50GB 30 days
A1 / Vivacom / Telenor
- Data
- 50GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$33.90$32.20
A1 Bulgaria and travel eSIM in Bulgaria
A1 Bulgaria is one of the networks your eSIM may use in Bulgaria. Here is who actually decides which network you get, and what to do with that.
Author: Bob Kanokphon Thongdee · Co-founderReviewed by: Porsch Kunnipat SiramanakulPublished: October 11, 2026Last updated: October 11, 2026
Quick answer
- 43 of the 101 Bulgaria plans we sell name A1 Bulgaria as a reachable network, at 4G and 5G.
- A1 Bulgaria runs LTE on B1, B3, B7, B8, B20, B28 and 5G on n78; your phone needs at least one of them.
- Travel plans connect by roaming, so no plan can promise one specific network.
A1 Bulgaria in brief
A1 Bulgaria (MCC-MNC 284-01) is listed with LTE on 900, 1800 and 2100 MHz and 5G on the 3500 MHz band (n78).
We are not a reseller for this operator and we have not run our own field speed tests. The band and network details below come from the sources listed at the end of the page.
A1 Bulgaria's bands and technology
| Item | A1 Bulgaria |
|---|---|
| LTE (4G) | B1, B3, B7, B8, B20, B28 |
| 5G NR | n78 |
| 5G launched | Live |
| Network code (MCC-MNC) | 284-01 |
Checked against the sources on 2026-10-11. Only the bands a source confirmed are listed; the network may run others too.
An eSIM can only use A1 Bulgaria if your phone supports at least one band in this table. Before you fly, open your model's spec page on the maker's site and compare its LTE and 5G band lists.
A1 Bulgaria's coverage map
A1 Bulgaria publishes its own coverage map. Look up the street or district you will stay in rather than the country as a whole, because coverage in town and out of town differs a great deal. The map shows A1 Bulgaria's own network; a roaming plan may not get every technology it shows.
Who licenses A1 Bulgaria
Mobile networks in Bulgaria are licensed, and their spectrum assigned, by the Communications Regulation Commission (CRC). The bands above are the ones it allocates. A problem with the local network's own service goes to the operator first; a problem with your eSIM plan comes to us.
The plans on our shelf that name A1 Bulgaria
From the supplier record behind each package, 43 of the 101 plans we currently sell for Bulgaria declare A1 Bulgaria as a network the profile can reach, at 4G and 5G. The figure comes from the same catalogue that prices the plan pages, and it moves when the supplier revises the record.
A plan naming A1 Bulgaria means the network sits in the list the profile may choose from. It does not mean your handset will stay on it. The priority order is the supplier's, and the signal where you stand decides.
A1 Bulgaria beside the other networks in Bulgaria
| Network | LTE bands | 5G bands |
|---|---|---|
| A1 Bulgaria | B1, B3, B7, B8, B20, B28 | n78 |
| Vivacom | B1, B3, B7, B8, B20, B28 | n3, n78 |
A band shared across networks is one a single phone can use on all of them.
Why plans do not name a fixed network
Nearly every travel eSIM is a roaming product: the profile picks a network by an order the supplier sets, not by the buyer. If A1 Bulgaria is weak where you are, try selecting Vivacom or Yettel Bulgaria manually in the network settings, and keep data roaming on for the eSIM profile.
FAQ
Will my eSIM definitely connect to A1 Bulgaria?+
43 of our plans name A1 Bulgaria as reachable, but that is not a guarantee. Travel plans run over roaming agreements, so the network depends on the supplier behind the plan, your device and where you are.
Which bands does my phone need for A1 Bulgaria?+
At least one of these, LTE: B1, B3, B7, B8, B20, B28; 5G: n78. Your phone's band list is on the maker's spec page for your model, under "Cellular" or "Network".
Does A1 Bulgaria run 5G, and will my plan get it?+
Yes. A1 Bulgaria has run commercial 5G, on n78. A travel plan only gets it when the plan permits 5G, your phone supports one of those bands, and you are inside 5G coverage. Miss any one and you fall back to 4G.
How do I see which network I am on?+
Check the carrier name at the top of the screen, or open the mobile-network settings and look at the operator list. If signal is poor, try selecting a network manually instead of automatic, but only one your plan actually supports.
Sources
- www.a1.bg homepage — A1 Bulgaria, October 11, 2026
- www.a1.bg/detailed-coverage-map coverage map — A1 Bulgaria, October 11, 2026
- Wikipedia: List of LTE networks in Europe — Wikipedia, October 11, 2026
- Wikipedia: Mobile network codes in ITU region 2xx (Europe) — Wikipedia, October 11, 2026
- CRC website — CRC, October 11, 2026
About the author
Bob Kanokphon Thongdee
- Co-founder of eSIMonline.asia
- More than 7 years in online marketing
- Founder of Cojourney Visa and Cojourney Travel
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