CoreESIM is engineered to provide optimal speed and coverage by connecting to Bulgaria's Tier-1 mobile network operators. Our service primarily utilizes A1, Yettel (formerly Telenor), and Vivacom. This selection ensures access to the fastest available 4G/LTE and 5G speeds nationwide, whether you are in the capital city of Sofia, exploring the historical sites of Plovdiv, or conducting business in regional hubs. Expect reliable, high-performance data connectivity.
HELP CENTER
Which Bulgarian mobile network operators does CoreESIM connect to?
Updated April 22, 2026
Was this answer helpful?
Related questions
Other answers in this topic that travelers found useful.
Can I activate my France eSIM before arriving in France?
Yes, you can! You can scan and install your eSIM before your flight. Your plan only starts when you connect to a French network, meani…
Read answerHow does a France eSIM work for travelers?
A France eSIM allows you to connect instantly to local French networks like Orange , SFR , Bouygues Telecom , and Free Mobile , withou…
Read answerIs my phone compatible with a France eSIM?
Most new smartphones support eSIM, including iPhone XS and newer , Samsung Galaxy S20+ , and Google Pixel 4+ . Ensure your phone is un…
Read answerWill I pay roaming charges when using a France eSIM?
No. Your France eSIM connects directly to French mobile operators, so there are no roaming fees . You’ll enjoy full-speed 4G/LTE local…
Read answerCan I make calls or send texts with a France eSIM?
Most eSIM plans are data-only , but you can easily make calls and send messages using WhatsApp, FaceTime, Skype , or Telegram . If you need …
Read answer