APN Settings removed after reboot

[DavidZeb]

I have a Verizon Galaxy S23 Ultra (unlocked) and am currently trying US Mobile.  This requires entering 4 APNs for the esim, which I can do just fine and the service works great.... Until I reboot the phone and all 4 APN entries are gone.

Entering 4 APNs after a reboot is a major hassle, and honestly a safety issue as I will not have any service until at least one of the APNs are entered.

Has anyone found a solution for this?  Is it maybe only a Verizon firmware issue?

[fbcan]

Same here. S24 + bell canana

[xogasn]

Same here with Public mobile in Canada. 

[victorinoxs]

Same problem with my Z Flip 6. My last Samsung phone was an S7. It it had a serious bug where phone radio would randomly stopped working and yet still show full signal; you won't even know that the phone is not working when this happens. I told myself to NEVER get a Samsung phone again.... many years later I thought maybe Samsung is much better now, so I switched from a Pixel 7 to Z Flip 6....now traveling with an eSIM with this APN nightmare. Very very disappointed..... 

[apn]

I found a solution that worked for me on US Mobile - Verizon Warp

Set all the APNs you need so the phone is 100% functional on network.

Goto: Settings > Connections > Mobile Networks > Network operators 

Then Un-select "Select  automatically"

Once phone scans for Networks, I chose my network: Verizon Wireless. You choose your network.

The phone then registered for several minutes before I did a force restart because I was impatient. Once booted, the APNs were still applied. I rebooted several more times and everything worked.

Hope this helps, Kyle.

[userbTVi7MHgZ9]

Just tried this, unfortunately it did not work for me.

S23+ on US Mobile  warp

[userBmtbQYXAp8]

I ended up flashing my phone with unlocked firmware. This link has general details. Essentially this removes the Verizon branding and modifications and gives you a clean Samsung firmware which still receives OTA updates. I'm not sure if you need to wipe your phone, bit I did so after making a backup with Smart Switch on my computer. Restoring from Smart Switch after the wipe and flash (with Odin) was easy.... Actually did it a few times.

End result, no issues with connectivity to US Mobile at all anymore.

https://xdaforums.com/t/sm-s918u-s23-ultra-918u1-united-states-firmware-flashing.4552341/page-11