Could not activate cellular data network!

[Altal14]

Hello guys.

My problem started few days ago, I can't use my 3G service at all any time I try using the Internet message pops up that 'couldn't activate cellular data network'

My iPhone 4 is factory unlocked, am using a customized ipsw by snowbreez 4.3.3, and in the past I downgraded from 4.3.5 to this version.

I tried everything, soft reset hard reset backup and even restore (but to the same customized ipsw 4.3.3) and nothing worked! The only thing lift is to update to 4.3.5

What's the deal of my iPhone?! What happened?! I never had this problem before please help...

NOW....
am giving up!!! i upgraded to 4.3.5 and still i have the same problem here

should i go fix it or what?! is it a hardware problem!!?

 

[Altal14]

Plz help guys... If u updated my iOS to 4.3.5 will the problem disappear?!

 

[Kyotoma]

Wouldn't hurt to try it and report back.

 

[Altal14]

The only thing that holding me from upgrading to 4.3.5 thats no unteathered jb for it.. Am hoping :/

 

[QuarterSwede]

It's probably a borked custom ipsw. I would try to make a new one before moving to 4.3.5.

 

[RyanS13]

Go into settings and reset network settings? This worked for me. But I also called *228 and activated again and updated roaming capabilities (I'm on Verizon) but I was having the same issue.

 

[Altal14]

I tried reset my setting nothing changed am gnna try to use another customized ipsw if it didnt work am gonna upgrade to 4.3.5 coz am desperate!!

 

[Enjoylife1788]

I tried reset my setting nothing changed am gnna try to use another customized ipsw if it didnt work am gonna upgrade to 4.3.5 coz am desperate!!

Try a factory restore with stock Ipsw and see if it works.. Nd then if it does then jailbreak with jailbreakme.com

 

[Altal14]

am giving up!!! i upgraded to 4.3.5 and still i have the same problem here
http://www.tipb.com/2011/01/12/iphone-bug-connect-cellular-data-network/

should i go fix it or what?! is it a hardware problem!!?

 

[iLauren]

settings > carrier > automatic should solve it

 

[Altal14]

always automatic never changed it!!

 

[apollo1444]

if your iPhone 4 is factory unlocked, why the hell are you using sn0wbreeze...

fail?

 

[Altal14]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

Yes fail!! I only knew how to downgrade by snowbreez and iReb!!

 

[Altal14]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

I upgraded to 4.3.5 and even didn't back it up!! And didn't work!!

 

[blueroom]

Sounds like a trip to the Apple store is in order.

 

[apollo1444]

try updating to 4.3.5 theres no need to protect your baseband...

 

[Altal14]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

I updated to 4.3.5 and the problem persist!! I am frustrated is it a hardware problem?!

 

[kbfr08]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

I updated to 4.3.5 and the problem persist!! I am frustrated is it a hardware problem?!

This is a problem with your SIM card And/or account features. I'm going to assume that since you're using an unlocked iphone, you're not on AT&T, so grab a friend's AT&T sim and test it out. If the problem persists with a known good SIM, then a trip to the apple store is your only solution.

Also, a few days ago could have been when your new billing cycle began, so give your carrier a ring to check out if they can fix the issue.