How to fix PDP authentication failure on iPhone?
‘Unable to authenticate PDP’
above msg is being shown whenever I am browsing any site. Pl clarify and steps to overcome the same
[Re-Titled by Moderator]
Turn off phone and reboot
If you still are getting the error, then Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will erase any WiFi passwords and you will need to reenter them, but your phone should work correctly after that.