In Reply to: Iphone4 sim cards? posted by AmyLouise on Friday, 11. March 2011 at 07:39 Bali Time:
Use international roaming, dont phone answer calls it cost will use sms its cheap.
Turn the 3g off so I will have no data charges.
Go a cafe or resturant and use there free wifi and use the apps installed like skype or viber which coast next to nothing.
hope this helps.