Almost the whole country of Bulgaria has cell phone reception, however, areas with low reception are high in the mountains or in remote areas.
Also, mobile phone networks can be expensive in Bulgaria. There are different offers with cell phone providers such as contracts or a pay-as-you-go plan. Cell phone providers may also have fees and taxes added onto their monthly or overall prices.
If you are a tourist in Bulgaria, you can purchase a SIM card at any of the listed providers and get a pay-as-you-go plan for your time there to have a phone number and Internet data. The most popular SIM card is by Mtel. Unless you buy an international calling plan, phone calls outside of Bulgaria can be insanely expensive. It is best to avoid making these calls with a cell phone without the appropriate plan.
Mobile Phone Providers in Bulgaria:
The Mtel contract costs 9.6 BNG per month and allows you to talk 'free' for 20 minutes. After the free talk, calls cost 0.30 BNG to another Mtel mobile devices and 0.48 BNG to other networks. SIM cards can cost anywhere from 10 BNG to more.