In Reply to: NZ Cellphone in Bali posted by lindalou on Saturday, 2. February 2008 at 17:42 Bali Time:
Global System for Mobiles.
Provided that you are not on a prepaid sim and your home accout carrier allows global roaming you should have no problems (apart from copping hefty call costs (sms is not as bad).
There is plenty of info on this subject by doing a search.
OMO get an indo SIM if you are going for any period of time or plan to make some calls.
Michael