ATT BB SIM in iP4: Could not activate cellular data network

[B-Mo]

I have tried searching and I can't seem to find anything that is helping me.

I have a legitimate ATT SIM that I took out of my work blackberry, cut it down and put it in my new iPhone4. It works fine for calls and text but I keep getting the error "could not activate cellular data network".

Based on what I have found it sounds like I need to edit some APN setting or something but I can't for the life of me figure out how.

I am running 4.2.1 officially activated on ATT. I have not JB or Unlocked it at all.

What do I need to do to trick it to use my existing data plan? Any help would be greatly appreciated.

[Cowboy]

You can not edit your apn on 4.0+ you have to change your plan from bb to iPhone data. Call in an they should be able to offer you the unlimited if you demand it

[B-Mo]

Would JB or anything help me do this?

I unfortunately can't call in and change my plan because it is from work and they won't let me officially switch over until sometime next year. I am just so ******* sick of this stupid crapberry that I was really hoping it would work.

[Cowboy]

Would JB or anything help me do this?

I unfortunately can't call in and change my plan because it is from work and they won't let me officially switch over until sometime next year. I am just so ******* sick of this stupid crapberry that I was really hoping it would work.

Nope your sol for now. There's always wifi.

[B-Mo]

Ok, well thanks for your help, it is greatly appreciated!

[Cowboy]

Ok, well thanks for your help, it is greatly appreciated!

No problem just remember to hit the button

[Volerikan]

I was able to change the APN on 4.0 and 4.1 on iPhone 4. use that unlock.nz tool (or whatever the site is), I don't know what you would put in there though.

I also don't know if it will work on 4.2.1. But when I used it on 4.1 I did not need to jailbreak it.

[Cowboy]

I was able to change the APN on 4.0 and 4.1 on iPhone 4. use that unlock.nz tool (or whatever the site is), I don't know what you would put in there though.

I also don't know if it will work on 4.2.1. But when I used it on 4.1 I did not need to jailbreak it.

I don't think it works for 4.2.1 tho

[thehandlessking]

You can use the .nz tool for editing API settings on 4.2.1. Just did it for my Sis-In-Laws iPhone 3G who needed a no fuss set up for her.