[OnePlus 7 Pro Questions & Answers] F104t3r:
No SIM card, or No network available -- Any help would be kind and appreciated.

At the start:

Oneplus 7 pro - GM1915 /US- active t-mob sim

LOS 18.1 (latest)

magisk 22.x upgraded along the way to current magisk 25.2, 8.0.7 app

Running LOS recovery ##// no issues since 18.1 came out

USB 2.0 port(s), good'ol red/white cable(s). ##// verified cables/ ports.. typical troubleshooting to rule them out)

Current Platform tools in $PATH

Issue. No SIM card.

Steps to masonry school:

I upgraded my LOS 18.1(magisk 25.2 persistent) to oos 12, then went to LOS 19.1. The update(s) went fine, or so it seemed... Booted fine. Still rooted. All's good until reboot. Then no SIM card found.

Mess around with turning off wi-fi, nfc, mobile data turn on airport mode... all iterations of that..

Occasionally it saw the sim card! Says, "Network unavailable." Shows T-mob on sim 1... Thinks it has 2 sim cards... ##// can't help but think this might be something

Set APN T-mob blah blah... wait.. go to local t-mob verify my sim is provisioned properly get new sim..

Their take is(of course) it's time to upgrade lol... Got a spare $800 laying around? If not, you can pay for it after there is no longer a recession lol... I digress(in distress)

##//

I started having worse problems upon performing the next 19.1 LOS_11-13-22 ota.

Immediately I got into a bootloader loop. I first tried my patched_110622-LOS_boot.img and got nothing but a seemingly successful boot, then those lovely "Power Off" words and back to bootloader.

Once back in fastboot I changed partitions(keep in mind I have not flashed anything to alter the LOS 19.1 boot restructuring at this point. Reboot. Same outcome. Bootloader loop. Booting to recovery, start, power off or bootloader all do the same thing... quickly reboot into bootloader.

I then decided to boot to twrp. I went ahead and did this

#>/ fastboot getvar all ###/// yielding partition a

#>/ fastboot flash boot_a twrp.img

#>/ fastboot boot twrp.img

The screen goes to "fastboot mode" and hangs. power+up_vol & it finally boots into twrp.

I then twrp installed the LOS update, which lead to more bootloops. Various dalvik cache/data and cache wipes after flashing, factory reset won't complete the reset... I have exhausted my limits of attempts at this point, so off to MSM I am.

All versions/drivers correct. On a win10Px64 now. Connects fine.

Now this is where it gets odd(to me anyway). I tried to go to stock oxy10, for GM1911AA and it hangs on the param preload. Something I don't remember seeing since 2020'ish. Tried multiple firmware until it took one, that was H.30. Successfully flashed. Booted. Found SIM card. Thought that was it.. Then I unplugged my usb cable from the op7p and *poof * reboot. After much digging and changing metedata preloads, various things to try to get this thing to work.

Current:

I can get it to run LOS 19.1 No SIM card found. Rooted with twrp and magisk no prob.

Just can't get it to work with the SIM, whether seen or not.

I am suspicious that I should have used H.31 for the MSM... however now it won't get past param preload with anything earlier than 11.5.1 Oxy 12. Also, I even went so far as to try flashing the CB firmware variant to see if it would take the T-mob firmware. Won't let me, says not compatible. So now I have a rooted op7pro that can only communicate via signal lol.. and not long at that...

Any thoughts/help/direction/suggestions, would be greatly appreciated.