RoamTheWorldCellPhones.com

Cellphone GSM Frequencies: 900/1800

(This means you will need a GSM cellphone that will work on 900MHz or 1800Mhz to use it in Bhutan.)

Cellular carriers for Bhutan

B-Mobile (Bhutan Telecom Ltd.)

Frequency: GSM 900
Website: www.telecom.net.bt/btelecom/mobile.html

Coverage Map

Tashi InfoComm Limited (TashiCell)

Frequency: GSM 900/1800
Website: www.tashicell.com

Coverage Map (NONE)

If you've used either of these networks or roamed in Bhutan, please post about your experience and the cost. Feel free to ask questions.