Internet
WiFi is readily available in the majority of hotels throughout the country. Many of the internet cafes offer WiFi also. Most population centers have internet cafes, although they are relatively expensive, and the connection is slow. Please make sure your travel agent find an appropriate internet cafe in advance if you need a connection for work.
Phone
The country calling code to Bhutan is 975. To make an international call from Bhutan, the code is: 00
Telephone call booths are existent in major towns in Bhutan. Most of Bhutan has mobile phone coverage, which is smartphone capable. B-Mobile has agreements with North American, some Asian and European countries on mobile roaming. Tashi Cell is another mobile company based in the country.
Tourists can now quickly and easily register for a B-Mobile SIM that is valid for 1 month. Simply take your passport to a B-Mobile office. The SIM card costs 50Nu and comes with 50Nu credit. Ask them to activate 3G/4G and data access while you are there, and test it works before leaving. There are no data plans per say, but the rate is affordable by international standards (0.0003Nu/KB). SIM Cards are available in all sizes (Standard, Micro, and Nano). Recharge cards are available at most stores and small shops.
B-Mobile and TashiCell have different frequencies for their data network. Check your phone’s supported frequency before getting a SIM card.
B-Mobile: 850Mhz (3G) and 1800Mhz (LTE band 3)
TashiCell: 850Mhz (3G) and 700Mhz (LTE band 28)
Post
Bhutan Post offers services throughout the country. It’s reliable but it takes quite some time for your postcard or letter to arrive in other countries.