Hello everyone.
I am new in this forum and with this phone Umidigi F1 Play too. I saw all this post from the begining and I saw there were two flash methods used: over FlashTool and ADB commands. I tried the conventional flashing over TWRP, in this way (without responsibility from my side for damage, data loosing or something else went wrong);
1. Unlocked bootloader
2. Flash TWRP (twrp-3.5.0_9-0-f1_play.img). Go into twrp
3. Format Data and flash "Disable-Force-Encryption-Treble.zip" for "No encryption mod"
4. Wipe all necessary: Dalvik Cache; System; Data and Cache
5. Flash System image (ROM-saved on the phone). Here, I tryed different ROMs and all those have worked with its issues:
- AncientOS-CIVILIZATION-v3.7-arm64-ab-vanilla.img.xz
- AospExtended-10-arm64-ab-vanilla.img.xz
- bliss10.0-v224-201015-arm64-bvN.img.xz
- Havoc-OS-v3.12-20201230-Official-arm64-ab.img.xz
- KomodoOS-2.5-arm64-ab-vanilla.img.xz
- Legion-v2.7-arm64-ab-vanilla.img.xz
- LeOS-Q-20210113-bvN.img.xz (really a very interessant rom with Micro-G)
- losq-v224-201017-arm64-bvN.img.xz
- Resurrection_Remix_8.6.5_arm64-ab_vanilla.img.xz
- Syberia-10-arm64-ab-vanilla.img.xz
- TitaniumOS-10-v1.0-arm64-ab-vanilla.img.xz
- Xtended-XQ-v8.0-arm64-ab-vanilla.img.xz
- ZenX-OS-v1.8-arm64-ab-vanilla.img.xz
---> I'm using Resurrection_Remix_8.6.5_arm64-ab_vanilla.img.xz, without Gapps (attached files with recognized sim cards)
6. Flash permissive file "Permissiver_v5.zip" to avoid loops
7. Reboot into system and search for "advance power" to select "reboot into recovery" or you can press vol+ and power button, together, then release power and vol+, in this order after reboot
8. Install gapps. I installed OpenGapps and NickGapps but i became a lot of issues with the roms, therefor I flashed BitGapps in its pico version (BiTGApps-arm64-11.0.0-R19_signed.zip - 82.4MB). For the moment I don't have installed any gapps
- If twrp says "there is no free place for the (gapps) installation" (25MB), you must go to the wipe menu and select "Advanced Wipe" button, check only "System" and at least the "Repair or Change File System" button (NOT swipe to wipe!!!), then "swipe to resize" you become 900MB free space and you can flash Gapps (the quantities of MB can be different...)
9. Now, you can root your phone, install Magix (Magisk-v22.0(22000).zip -) and reboot into system. That's all folk!
Of course there are more roms don't working but the list is too large. If you see, the most of roms are from the PHH Project in its vanilla version, other ones like "berkay" or "Erfan" don't work with me, try it, maybe you'll have more luck (or maybe I have done something wrong)
Enjoy!