If you’re traveling to Bulgaria, getting a local prepaid SIM card is the easiest way to stay connected. Among the country’s three major network providers, A1, Vivacom, and Yettel, recent travelers often recommend A1 as the most straightforward choice for foreign visitors.
This guide reveals how the network performs, where to buy a SIM, what it costs, what the registration process actually involves, and when an eSIM might be the simpler choice instead.
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A1 was formerly known as Mobiltel and M-Tel before rebranding to A1. You might still see the name “M-Tel” mentioned on some third-party eSIM websites or older travel blogs, but it refers to the exact same modern A1 network.
It depends what you care about most. According to Opensignal’s most recent Bulgaria report, A1 has the fastest overall speeds and wins the Consistent Quality award (the share of tests with a strong enough signal for a good experience).
Yettel ties A1 on video streaming experience and leads on time spent connected to the network and overall reliability. Vivacom has the best coverage and the best 5G coverage, plus the most time spent on 5G specifically.
If you want fast, responsive data for everyday city travel, A1 is the best overall performer. If you are taking extended road trips into remote countryside areas, Vivacom offers slightly broader coverage.
You can purchase physical A1 SIM cards at official A1 retail stores located across major Bulgarian cities like Sofia, Plovdiv, and Varna, as well as at authorized electronics shops and convenience resellers.
Physical SIM availability at airport desks (such as Sofia Airport or Burgas Airport) can vary depending on counter hours and stock. If you need mobile data the second your plane lands, purchasing an online eSIM before departure is the most reliable option.
A1’s prepaid system uses a starter pack combined with separate data add-ons, meaning you usually purchase the base SIM and a data bundle together.
Here are common A1 prepaid plans for tourists:
Note: If you keep an active Bulgarian phone number for repeated visits, an A1 pay-as-you-go line can stay active long-term simply by topping up €5 every 3 months.
Bulgarian law requires all prepaid SIM cards to be registered with a valid physical passport or official EU ID card at the time of purchase.
The retail clerk will scan your passport and activate your SIM card right at the counter.
Foreign tourists frequently report that staff at Vivacom or Yettel shops sometimes claim prepaid SIMs are unavailable or try pushing long-term 2-year contracts. A1 store staff generally process prepaid tourist registrations smoothly and without sales pressure.
Setting up an eSIM online before departure lets you skip store visits, passport registration queues, and language barriers completely.
If you want a fast digital setup, Gigago’s Bulgaria eSIM provides a convenient alternative. It connects directly to local Bulgarian networks (listed under the A1/M-Tel network). You receive a QR code via email, scan it to install, and activate mobile data as soon as you land. You will bypass in-store passport checks, sales counter queues, and physical SIM swapping.
Plans range from $2.00 USD for short 1-day visits up to $99.50 USD for heavy-data, 30-day extended trips, allowing you to match exact travel dates.
Yes. Bulgarian regulations require every prepaid SIM card to be registered with a valid passport or official EU ID card.
Yes. Recent network benchmarking confirms that A1 delivers the fastest average download speeds and most consistent connections across Bulgaria.
Yes. Buying an eSIM online allows you to skip in-store passport registration paperwork and avoids any potential miscommunication at physical retail stores.
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