09-22-2021 09:22 PM - edited 01-06-2022 03:36 AM
I tried adding Public Mobile APN settings with my old sim card in. The saved APN setting disappeared sometimes. I also had the issues setting MMS port, MMC and MNC. These values got changed after I hit "save" button. My cell phone model is Samsung Note 8 (exact model is SM-N950F. Does it mean Public Mobile doesn't support my cell?
09-22-2021 11:18 PM
@lindawyu0 , there is something wrong here. Even if you were manually creating your own APN, the MCC (mobile country code) and MNC (mobile network code) are self populated based on the SIM card in the phone. MMS port is a user input. Is the phone picking up the SIM card? Even without an APN, you are able to connect to the network and have phone call capabilities. The APN is only for mobile data which includes MMS.
09-22-2021 10:31 PM
What android OS is your phone currently using? Did you recently update?
09-22-2021 09:59 PM - edited 09-22-2021 10:08 PM
Can you set your phone on 3G network and try again?
You may find some idea to troubleshoot from this article:
09-22-2021 09:33 PM - edited 09-22-2021 09:35 PM
@lindawyu0 You phone should be no problem to be used in PM.
Is your phone a SIM sim version?
try to do a Network Reset and see how it goes
If it still not working, try Factory Reset
(if yours is a dual SIM version, try the SIM on another slot)