Light and proximity sensors not working, need help!! - Redmi K20 / Xiaomi Mi 9T Questions & Answers

One day my proximity sensor randomly stopped working, I fixed it once using the incoming calls dialer method but then it stopped again. After that my light sensor stopped working. I thought it was my persist partition that was corrupted but I tried flashing the fastboot from and even tried flashing the persist IMG extracted from the fastboot rom but it didn't fix it. I don't know if the hardware itself is broken or if it is a software issue. All my other sensors work. Someone, please help me fix it. I can't go to the service centre to repair it as it was purchased in India and now I'm in the UK

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[Q] Wifi not working after boot repair

Hi Friends,
My I9500 got unbricked by BOOT repair from a local shop. but after boot repair, its WIFI and Bluetooth stopped working. by looking at the logcat, it seems some issue with driver.
Does anyone else have faced similar issue?
can anyone please share latest boot and modem images so that I have try to re-flash it by myself.
Thanks
Pawandeep

No service, No IMEI and No clue

Hi,
My friend has bought a SGS7 because his SGS4 faced a problem, so he gave to me to fix it
The problem is as follows:
The phone sees the sim after maybe 5-10 minutes AFTER booting up and then 5-10 min after that it vibrates twice and than reboots its self. When the phone boots up and i try to view the imei by *#06# there is no response however a while after that when the sim is recognised the imei box pops up. Even without the sim the exact same things happen
#*The top part of the screen is gone slightly pink I think thats because its due to overheating as the phone is hot when for example is charging and not being used or when the phone is used to play spotify with the screen turned off dont know if this will help anyone the casue of the modem disfunctioning but the screen is pinkish where the processor and the sim is so...*#
Now i have tryed some troubleshooting withut success i have done as follows:
I've changed the sim tray which didnt help at all
I put tape on the sim/sdcard conncetor to add more pesssure (worked for other) without success
Tried to downgrade to 4.4.2 to change modem as there is no mode for the lolipop version of the stock rom
And lastly i have applyed the 4.4.2 modem to 5.0.1 that did nothing to the system
Please help me i have searched trough google and found out that this only happens when downgrading for lolipop to kitkat but he has never done anything to the phone no root not even a screen repair (where im based there are may scamers who replase the screen and than say the for the screen to work that had to modify the system thanks to that they charge more for the repair)
Please help, anyhelp is useful
cheers
Anyone?
the_ziom said:
Hi,
My friend has bought a SGS7 because his SGS4 faced a problem, so he gave to me to fix it
The problem is as follows:
The phone sees the sim after maybe 5-10 minutes AFTER booting up and then 5-10 min after that it vibrates twice and than reboots its self. When the phone boots up and i try to view the imei by *#06# there is no response however a while after that when the sim is recognised the imei box pops up. Even without the sim the exact same things happen
#*The top part of the screen is gone slightly pink I think thats because its due to overheating as the phone is hot when for example is charging and not being used or when the phone is used to play spotify with the screen turned off dont know if this will help anyone the casue of the modem disfunctioning but the screen is pinkish where the processor and the sim is so...*#
Now i have tryed some troubleshooting withut success i have done as follows:
I've changed the sim tray which didnt help at all
I put tape on the sim/sdcard conncetor to add more pesssure (worked for other) without success
Tried to downgrade to 4.4.2 to change modem as there is no mode for the lolipop version of the stock rom
And lastly i have applyed the 4.4.2 modem to 5.0.1 that did nothing to the system
Please help me i have searched trough google and found out that this only happens when downgrading for lolipop to kitkat but he has never done anything to the phone no root not even a screen repair (where im based there are may scamers who replase the screen and than say the for the screen to work that had to modify the system thanks to that they charge more for the repair)
Please help, anyhelp is useful
cheers
Click to expand...
Click to collapse
I'm having the same issue.
Fresh wipe and install corrects the error but once the battery goes flat I lose all connection except WiFi.
Non of the *# codes seem to work either.
Any help would be appreciated.
Thanks

Touch screen Malfunction after a Screen On / Off event OR using Lock/Unlock button

Model : Yureka A5510 [not plus]
my phone was working perfectly .. no issues at all.. after JIO 4g launch. I read some of the articles to enable VoLTE without using JIOVoice application. I though to enable VoLTE.. and tried to install a firmware for my Yureka A5510.
and I hardbricked my phone. Just redlight blink on top left cornor. NO BOOT, NO FASTBOOT, NO RECOVERY
I googled. and found some article to unbrick by flashing eMMC image on SD card to bring it in to fastboot mode. (using six pins on the motherboard and key comnbination)
finally I am succeed to flash the STOCK firmware by FASTBOOT.
But I lost the IMEI, so NO network.. again googled a lot and I made the IMEI fix with the help of QXDM Tool.
now the problem is with the touch screen. it works fine after a restart untill I press the Lock / unlock button.
After Unlock the touch pointer shows on different locatoin and lower 1/4 part doesn't respond.
I enabled developer mode and enable show touch points... that tells me the location of the touch.
I AM PRETTY MUCH SURE IT IS NOT A HARDWARE ISSUE, BECAUSE IF WORKS FINE IN RECOVERY MODE(CWM RECOVERY) AND ONCE AFTER EVERY RESTART.
.. CAN YOU HELP ME .. PLEASE.
PLEASE TAKE SOME TIME AND READ IT.
I have same Yureka model YU5510A and i soft bricked my phone when i was flashing VoLte Rom. It's been 1 whole month and i haven't found any solution. i tried flashing through CM recovery and fastboot and YGDP tool but non of it works. I am so pissed off. Did you find any solution bro?

Accelerometer and Gyroscope Working Incorrectly - Mi Mix 3 5G

Hey everyone,
My accelerometer and gyroscope direction are wrong. When I turn on automatic rotation in Android it goes to landscape when I hold my phone in portrait mode and vice versa.
The problems started after I used the Xiaomi Flash Tool to return to stock. I used the clean all and lock option. I used TWRP to flash persist.img to get rid of the device search error in MIUI. After this my accelerometer started to be 90 degrees inverted.
The problem is fixed by flashing the persist.img (if you didn't make a backup of your persist partition) from the Telegram group for the Mi Mix 3 5G: https://t.me/mimix3_5G
I've got same problem with my phone.
Can you provide instruction how to fix it ?

OP8Pro sensors not working

Hello guys, I have a problem with my Oneplus 8 Pro IN2023. the proximity sensor, light sensor, screen rotation etc. do not work. I have tried to install different versions of oxygenOS and each has the same problem. when trying to return to android 10, a crashdump appears, which prevents it from starting. from the information i found there may be a problem with the persist.img folder. could someone please help me with this problem and share the file or suggest another solution?

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