Many people, including some friends, keep getting a really annoying PDP authentication failure message on their iPhones and I am struggling to find a solution. It appears, though, that there are some tricks to fix the PDP authentication failure and get your gadget working properly, even though the message might come back. So let’s see below how to fix the iPhone PDP Authentication Failure:

So here’s what you should try in order to get your iPhone rid of the PDP authentication failure message:

Go to Settings -> General -> Reset -> Reset Network Settings on your phone and simply reset the network setting on the iPhone. Please note that this is not an official or accepted method – read: not coming from Apple or AT&T. Unfortunately, the two mentioned companies seem to have no solution for the PDP Authentication Failure.

IF this doesn’t help, you could always try to contact the service, but various and furious reports all over the world seem to suggest that it’s not helping. Now please tell us – if you encountered such a problem with the PDP Authentication Failure, how did you get rid of it – was it the method above or another?