Since in the newbie guide it says
'If all fails and you truly think you have an unique problem, feel free to post up a new thread (with a clear title to help improve search results) or give a shout out to the regulars in the iPhone Club pinned thread following the recommended question template.'So I made this thread.. sorry for any inconvenience!
iPhone Generation : iPhone 3GS
Unlocked? (or Part Number): Unlocked. MC132MY.
Current Firmware : 3.1.3.
Current network: (for example Maxis) Maxis
iTunes Version : 9.0.3.15
PC/MAC : PC
Jailbreaking software : No Jailbreak
Problem Encountered : Cannot disable Edge/GPRS (when wifi and 3g are OFF) even after following newbie guides and forum sifus
Steps Taken So Far :
1) Followed this guide
http://forum.lowyat.net/topic/752226/ to use iPhone_3.1_Maxis_my.ipcc file, now can choose 'Cellular Data Network'. Changed APN to gibberish as explained in various guides.. also tried using
http://iphonenodata.com/ and
http://unlockit.co.nz/2) Followed the advise
For Maxis Users: If all of the above suggestion fails, you need to insert a non maxis simcard and then set the APN with some gebberish words and then swap back your simcard. Your internet connection should fail to connect. swapped friend's celcom and digi simcards, changed APN, my iphone still can use edge/gprs after done everything..
3) I also noticed that if i swap digi/celcom sim card, changed APN, when swap back my maxis sim card, the APN resets to default maxis correct APN settings! it's like they hard coded in the sim card and i can't change them

Screenshot of Problem(if applicable) :
Other Information/Remarks :
HELP~~ The maxis internet bill is killing me! i read every thread in lowyat edi still no solution T-T