The Easiest Ways to Disable Data on your iPhone 3G / 3GS

This is for those poor souls who got served a 200SGD bill from Singtel because they didn’t read my article on the dangers of getting an iPhone without a data plan or read it way too late.

To disable data on your iPhone if you don’t have a data plan, the easiest way is to install bossprefs via Cydia and turn off edge and 3G, if you have a jailbroken iPhone.

For those of you purists who rock original unmodified iPhone software, the best way is to mess up the APN settings.

Under Settings>General>Network>Cellular Data Network>Advanced, change the settings from this;

APN: e-ideas

to something like this;

APN: xxxxxx
Password: zzzzzzzzz

Remember, it is not enough if you just turn off the 3G in the settings. All it does when you turn off the 3G is to revert to Edge/GRPS in order to save battery power.

Edit: Ever since iPhone 3.0 came out, many iPhone users, particularly Starhub ones, have complaint that changing the APN settings no longer stop the 3G/GRPS data from working. The only way is to call up Starhub, and tell them that you want to cancel your GPRS service with immediate effect.


MacRyu is the Mac Blog by Singaporeans and for Singaporeans. It was started in April 2007 as a side project of the then President of the Official Mac User Group of NUS, Ryu, and grew to become possibly one of the most popular Apple-related sites based in Singapore. MacRyu hopes to provide you with more Mac-related info, thoughts and stuff, from the Singaporean perspective.

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