08-31-2018 11:57 PM - edited 01-05-2022 01:37 AM
I have the same problem with UMIDIGI Z2. It seems that this is a problem on any Andoid 8.1 phone because the APN settings are not editable and the carrier is providing only the sp.telus.com APN which is an incorrect one for Public Mobile.
09-04-2018 02:22 PM
This issue is due to the poorly built rom using outdated apns-conf.xml which defaults to Telus APN when it detects the Telus MCC on the SIM.
Since PM is a Telus MVNO so the only way is to add a new APN which is can be found here: https://productioncommunity.publicmobile.ca/t5/Phones-Hardware/How-do-I-set-up-data-APN-on-my-smartp...
If it cannot be added on Android then you are SOL without root, with root you can use the updated xml that reflects the changes.