Bought SGW about 2 weeks ago and totally new to Android.

Dialled *100# to purchase 2 days of Maxis Prepaid Broadband, but could not get Internet to work. Tried Google and set the Maxis APN accordingly also useless, then I reset the phone. Yup it worked, but only for a little while, and when I checked my credit balance, it went from RM29.00 to RM0.90!!! Note that RM10 for 2 days Maxis Prepaid Broadband already deducted from RM39 to RM29.

Any explanation why my credit went down to RM0.90? I thought the RM10 will cover 500MB for 2 days?