Missing APN from Iphone 4 need help

[vietkool]

about aweek ago, My wife calling to change the plan then my T-zone (5.99) gone away. I tried to access to internet of course it didnt work so I reset the network, reboot the phone then the Cellular network data tab no longer available. I call Tmoble add data plan back ($15.00 plan) but I can get in the internet since the apn tab no there. Please help guys. I am very much fed up with this. I try every method that I found from google. but no luck

[Poseidon79]

I didn't think there was a way to manually adjust your APN. My buddy always has to patch his CommCenter file then load a custom carrier file through iTunes.

[vietkool]

how do I do that ?
where do I find CORRECT commcenter files and custom carrier file?

[Poseidon79]

Check out the top search result!

[vietkool]

thanks buddy, I think I got it follow the guide from this link >> Patch CommCenter & T-Mobile US Enable Carrier Bundles

Hopefully the setting stay intact every time reboot the phone.

the internet access is working fine now but under network tab, still not showing the cellular network data option. it disappeared for good