In Reply to: Try this posted by travella on Friday, 16. July 2010 at 09:09 Bali Time:
It dramatically reduces your credits. You can try it. I did it, but you don't get a free call for dialling *888# for a balance update from outside indo. Luckily I had the phone number of my sim, but if you dont have enough credits, you'll need to wait until you get to your destination then top up and send a text to your friends, family or a local person such as your driver. For voice to friends back home use 01017 61 and drop the first zero. That 01017 code will put you on a cheaper voice call rate using VOIP.