If you are an AT&T customer who has an iPhone but you’re not an iPhone contract holder, your are probably experiencing the “Could not activate cellular data network. You are not subscribed to a cellular data service” message when you try to connect to the internet through Safari are when checking your email. I recently had the same issue and did some playing around to get the problem remedied. Apparently AT&T has tried to make the new software update wipe out your internet settings and access to your cellular data network settings page if you don’t have their over-priced iPhone plan (Tmobile unlocked iPhone users aren’t experiencing this problem because their cellular data network setting is still accessible).

The fact that this has happen shows that these corporate Tyrants will do anything they can to drain the life’s blood out of your pocket book, and once again shows why the world needs guys like us to find ways to beat them at their own game. I have found a solutions after a little bit of research. First you will need to have your iPhone 3G Jailbroken and access to wifi since your iPhone won’t connect with your data plan:

1. Go to CYDIA and do a search for an app called APN Editing. Install the app only if you don’t see
“Cellular Data Network” options under Settings > General> Network

2. Install the APN Settings app to your iPhone 3G.

3. After this, an Icon called “APN” will appear on your Springboard when you close CYDIA.

4. Tap the icon and it will take you to unlockit website on your iPhone.

5. This will take you to “APN Changer” on your iPhone browser.

6. Where it says “Blank” for carrier, change it to AT&T (or what ever carrier you have) and continue.

Once you have done this your cellular data should work again! Pull up Safari to double check that everything is running as is should be (be sure to turn wifi off). If not you may need to reboot your iPhone so the settings can take, but in my case, this was not necessary.

Special thanks goes out to the guys at unlockit.co.nz for a great app that helps us continue to enjoy our iPhones in their full capacity.