[Help] Problems flashing any android 10+ roms on my redmi 7 device - Xiaomi Redmi 7 Questions & Answers

Hello XDA people. I'm an enthusiast of flashing and testing android ROMs, but I am kinda rookie using this device.
The problem in question is that I cannot successfully flash any Android 10 and later ROMs on my device, I always face several problems after flashing and booting any ROM, such as the wifi's not working (got the exclamation mark on the icon), audio problems, mobile data increiblely slow, bluetooth and GPS issues, etc etc. I tried to flash official and supported ROMs like lineageos, evolutionx, pyxisos, havoc as well as unofficial roms, but I always get the same problems (the wifi issue is the problem that I want to fix the most)
I tried flashing the original MIUI firmware through recovery and bootloader method, I dirty/clean flashed the roms after and nothing, I also used factory reset, used OrangeFox, TWRP (official and unofficial versions) and I still have the same result. I tried every method I know and it seems I won't have the problem fixed. I don't know if it's that the firmware is not properly flashed, or if I deleted a partition. What can I do?
The device only works using the MIUI original firmare but I don't like it because of the bloatware and the waste of resources. I currently use MMX rom (a modified MIUI rom) in my device right now. It works well but It's currently outdated. I just want to use an AOSP based ROM and having my device updated. Please HELP ME!

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Cannot flash Kernel , recovery or even original ROM

Hello,
I am facing a weird problem with my htc one v for 4-5 months. Several times I installed custom ROMs and KERNELs and also went back to original ROM using ruu. I did that because 3G was not working. I thought if I could get it back. But few months ago , I tried CM-10 KANGBANG and after that 3G started working like before. But now I could not install original ROM. Even I was unable to install kernel and recovery. because it always shows problem with pc connectivity. I tried other roms which require kernel flashing. but could not connect to my pc to flash kernel. so those ROMs became useless. Now I am using MIUI by rulling. thanks to that ROM. only this ROMs works now. It just happened after installing CM10 KANGBANG. its so irritating. What will I do now? I tried rumrunner. still negetive. no connectivity with pc.

[Help] Upgrading AT&T i747m from CWM/4.4.4 KitKat to TWRP/CM12.1

Hello guys,
It's been a while since the last time I visited the SGS3 section, over a year ago I remember updating the bootloader in order to upgrade/flash to 4.4.4 which went very smooth and was a success. I gave the phone to a sibling who has been very happy with it for the last year and a half. Lately, the phone has been very unstable with the 4.4.4 KitKat ROM, WiFi doesn't turn on, Bluetooth is unstable, Unstable apps/Force closes. I tried a wipe/factory restore and re-flashed the ROM but the problems persisted.
I did a little research and liked what CyanogenMod is doing and since they are actively supporting the phone I decided to flash CM12.1 and the provided Open Google-Apps, CM12.1 flashed successfully but Open Google-apps refused to install, CWM displayed (Section 6) error which upon research it is common with CWM and the solution is to flash TWRP. I booted with CM12.1 in order to install TWRP Manager through the APK and flash TWRP but it force-closed when it searched for the device model. WiFi was working but Bluetooth was still unstable.
I would like to know what would be the best way to proceed in this case, I would like to upgrade the recovery to TWRP and flash CM12.1 or any other stable Lollipop ROM.
Thanks,
Oscar
absolute all credit to @audit13.
http://forum.xda-developers.com/showthread.php?t=3313734
perhaps this will help.
"err on the side of kindness"

Is it safe to flash a similar device's cm to another device?

So I am new to cyanogenmod and flashing but is it possible to flash a cm of device 1 to device 2 provided they have the same specs. And if it is possible, suggest me a rom for HCL ME Y2. (P.S-I tried Y-DROID and it crashed a lot and sometimes Play Store stopped working so I flashed the stock rom.)

Flashing ROM bricks phone?!

I'm currently running my OP3 on Resurrection Remix 5.7.4 (MM 6.01), the phone has the latest version of TWRP and I've flashed other ROMs in the past without any issue
RR has proven to be quite unstable for me, the system UI keeps crashing, which renders the phone unusable until after a reboot so I wanted to flash Freedom OS as that worked quite well for me previously. When I tried to flash the ROM in TWRP the ROM seemed to flash successfully but when I rebooted, only the boot logo showed and then the screen went black and the phone refused to respond at all for about two hours, after that exactly the same thing happened. I managed to boot into recovery and tried flashing a different ROM but the result was the same every time, the only way to get the phone to work normally was to flash RR again/restore from a Nandroid backup, either way, the result is the same, I'm stuck on an unstable ROM and I don't know why, the last time I flashed these ROMs they worked fine, I followed all of the instructions for flashing said ROMs to the letter, I have the latest version of TWRP, etc, does anyone know what the problem could be?
Have you flashed the latest firmware? If not, I think this is why due to you being on a very old version (6.0.1) and as you are not flashing official OxygenOS you are not getting the newest firmware.
Download and flash the latest firmware here:
https://forum.xda-developers.com/oneplus-3/how-to/radio-modem-collection-flashable-zips-t3468628
Pick the right one for the ROM you are flashing (For Freedom OS installing firmware Open Beta 14 - Firmware + Modem under 7.1.1 should be good.)
Note: After you have flashed the firmware the next time you reboot the phone it will appear to not turn on for a few seconds, this is normal while it updates, don't worry
Let me know if you have any questions

Redmi 8T, NFC not working on custom ROMs.

Hello, I am using Redmi note 8T, and, as the title says, I have a problem with NFC. I unlocked my phone and installed Official Pixel experience plus, as a first custom rom for this device, and NFC option wasn't there. I did flash vbmeta to get my phone out from "The system has been destroyed", otherwise everything went smooth. At first I thought that this is a rom problem, but after testing ColtOS, AOSP extended, EvolutionX, and few other ROMs, NFC still wasn't showing in the settings. At some point I installed unofficial LinageOS 16, on which my NFC showed in settings, and worked. Also I found CesiumOS, on which NFC worked as well. For me it seems, that unified ROMs identify my phone as Note 8, not 8T, but I don't know how to fix that. I tried different versions of TWRP, different firmwares, I tried flashing persist in TWRP, the problem is still unfixed. I also tried deleting scripts that are responsible for disabling NFC in menu, from ROMs, but it didn't help. I also tried installing official ROM through fastboot, on miui NFC works, but when I changed my rom to Pixel experience or any other, same problem.
I wanted to look for similar problem on other devices, but I don't know any which were released as 8 and 8T (practically same model, one with NFC), so if you know such phones, it would be helpful, if you will tell me.
Maybe it means something, but I've installed TWRP 3.3.1.0-10, and when I try to flash firmware for willow I get error 7. I've fixed it in past by using an older recovery.

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