*122# to check balance & validity. FOC. *100# check balance, redeem reward etc. FOC. 11311 3G/GPRS/MMS settings, PUK Code etc. FOC. Send enquiry email via http://www.maxis.com.my/personal/general/personal/feedback_new.asp Customer Service 1300 820 120 Charged at local call rate ... expensive la. Maxis Centre ... ma fan. Tips to call for free - Call 122. Keep clicking 0 for around 30 times then the call will forward to Hotlink Customer Service. Haven't tried yet.