@klinster , I got it working on mine. Sorry it took so long to figure it out. There's a firmware conversion thread here with trusted software (mauronofrio is amazing). I created a video recording of the process so if the footage turns out, and you're interested, I'll PM you the YouTube link when published
The firmware conversion is really simple to do and should enable dual-sim if you buy the tray... disclaimer: I haven't tested dual-SIM yet haha
Personally, I went with Lineage with MicroG
You just need to flash the stock firmware after flashing this rom.This sounds like its exactly the issue I've found after purchasing a HD1905 that is clearly a T Mobile phone. After side loading the Linage OS recipients hear only the fax beep sound and calls are unsuccessful. You wouldn't be able to share a link to that video by any chance? ... Otherwise, its the brave new World (for me) of switching firmware to make this phone usable.
LOS version 18.1
Build number - lineage_hotdogb-userdebug 11 RQ3A.211001.00110036562
Thank you for the speedy reply. Im more confident now that this is fixable, yet I am stuck head down studying atm, but will give this a go asap, and will share results and anything that might be useful. Cheers!
I mainly needed for gboard. I adjusted the vibration from gboard settings but it changes the feel. I think it ks bit more than my liking.
You will have no problem (OTA update, etc.) if you follow the official instructions very carefully.
@LuK1337After reading various comments, I am about to flash Lineage OS,
but before installing I want to know
1) After installing the ROM as per official Lineage OS instructions on official web site,
before booting; do I need to change the slot from fastboot command?
and repeating the full procedure on other slot.
If no need to change the slot, it does mean that I don't need to do anything, the next update will automatically install on other slot. and then next to previous and so on.
2) If I flash Lineage OS on both slots at the time of fresh install, will there be any problem for my device?
Almost there (nearly). I managed to get the latest stock ROM and extracted the contents using payload dumper Go. i copied the files to the same location that i have adb and fastboot and i rebooted to recovery,,,
I was able to test that the dual -sim is not functional for (OT7T) OnePlus 7T with LineageOS 18.1.
Just grab one of the unbrick toolkits, and then do an OTA update.
About updating firmware on hotdogb:
If needed, you can download the required files for updating your firmware here (unzip and follow the official instructions ... use LOS recovery in fastbootD mode)
What is your-- LineageOS version: LineageOS Download url: Gapps version: Did you-- wipe: restore with titanium backup: reboot after having the issue: Are you using-- a task killer: a non-stock kernel: other modifications: Provide any additional information (observations/frequency of problem/last version it worked on/etc) as needed: