If you see No Service or Searching on your iPhone or iPad

Could not activate cellular data network - Apple Community Jul 24, 2015 Unable to connect to mobile data | AT&T Community Forums Apr 16, 2020 iPhone: How To Fix “Could Not Activate Cellular Data Network”

Apr 17, 2019

How to Fix “Could Not Activate Cellular Data Network Enable Cellular Data. The first step would be to make sure that Cellular Data is enabled on your … iPhone Bug: Can't connect to cellular data network | iMore Jan 12, 2011

Solved: Could not activate cellular data network

Apr 10, 2019 What's with the PDP Authentication Failure when connecting SMS worked. Data - did not work. APN Authentication Failure. Tried before this - airplane mode - cell settings reset - power cycle (turn off/on) phone - hard reset - network setting reset - several APN profiles (only useful if you change to local SIM card) The data roaming ON was set on my phone, but that wasn't working on movistar service. Can’t connect to cellular data on Surface?