PDP Authentication Failure on iPhone
How do I sort out a pdp authentication failure?
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Try this:
If your iPhone or iPad is saying PDP Authentication Failure when you try to access the Internet please follow the steps below.
- Put your device into airplane mode for a few seconds.
- Turn off the phone and reboot.
- If you are still getting the PDP Authentication Failure Message, go to Settings > General > Reset > Reset Network Settings. This will reset the networks setting on the iPhone or iPad.