After downloading App...

[Alysabeth]

I jailbreak my iphone with no problems... was going just fine until today I started installing applications from Itune... then I get a conntection error saying it cant connect to itunes and to plug it in intune on the computer to connect... I do that, Then I get this error:

The iPhone "iPhone" could not be activated because the activation information was invalid. please try again later."

Rhis olny seems to happen to me when i download a app from itunes... and the information should not be invalid because Im a ATT customer... I've already reformat it... I dont want to have to for a 3rd time after I put applications on it... Someone help me please give me a soulution...

[sziklassy]

It is possible that your sime is going bad. I would try one thing before calling ATT though. Do restore to the factory 2.1 settings (not a jailbreak) and see if you get the same problem installing apps (this will rule out user error). if this still exists on a stock 2.1 I would give ATT a call. If they don't know what to tell you, call Apple.

[Amt]

You got "The iPhone "iPhone" could not be activated because the activation information was invalid. please try again later." because it is jailbroken.

[skb875]

Is iTunes authorized to your computer?

In iTunes go to:
Store > Authorize Computer

[Alysabeth]

I fix the the problem by restoring it... and not download the apps from the phone, but doing it from itunes instead... No problems that way so far...

[TheAppShare]

Log into iTunes, then do a fresh Restore & Sync.