RoamTheWorldCellPhones.com

Cellphone GSM Frequencies: 900

(This means you will need a GSM cellphone that will work on 900Mhz to use it in Brunei Darussalam.)

Cellular carriers for Brunei Darussalam

DataStream Technology (DTSCom)

Frequency: GSM 900
Website: www.dst-group.com

Coverage Map

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