Question Realme C21-Y RMX3263: hard reset - factory reset with black screen / no button

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sverza

Senior Member
Jan 15, 2008
280
40
Hello,
sorry to write here, I cant find the C21-Y section.
Direct question: is there a way to perform a factory reset not having the possibility to do it using the combination VOLD DOWN + POWER BUTTON and NOR using the standard Android UI?
Note, not activated debug mode
For more details see here below

I recently did a factory reset in "normal way", I mean using the standard Android user interface through normal menu.
Then, I changed only 3 things (without considering the minimum settings required at the first boot): show battery percentage, start black user interface menu and then after selecting the high contrast display... the display became black.
The display is responsive, because the phone vibrates if I touch in the position of the 3 buttons (back, multi, back).
Then, waking up the phone I can see the black smoothing on the display (hoping to make myself clear...) and I'm able - fortunately - to switch OFF the phone (basically touching the display in the right position and swiping to back, after holding a little the phisical on-off button).
Then, the display is working in the boot sequence (I can see the Android logo and the Realme animation): it stops once the Android system is loaded.
So, I tried booting the phone with the combination VOL DOWN + POWER BUTTON but it doesn't work... It seems an issue that afflict some pieces of this phone (read in some post, video I searched before writing here)

Well, how I can in this situation perform a factory reset?

Realme C21-Y RMX3263
32gb-3gb
Android 11
 

MrMiyamo

Senior Member
Hello,
sorry to write here, I cant find the C21-Y section.
Direct question: is there a way to perform a factory reset not having the possibility to do it using the combination VOLD DOWN + POWER BUTTON and NOR using the standard Android UI?
Note, not activated debug mode
For more details see here below

I recently did a factory reset in "normal way", I mean using the standard Android user interface through normal menu.
Then, I changed only 3 things (without considering the minimum settings required at the first boot): show battery percentage, start black user interface menu and then after selecting the high contrast display... the display became black.
The display is responsive, because the phone vibrates if I touch in the position of the 3 buttons (back, multi, back).
Then, waking up the phone I can see the black smoothing on the display (hoping to make myself clear...) and I'm able - fortunately - to switch OFF the phone (basically touching the display in the right position and swiping to back, after holding a little the phisical on-off button).
Then, the display is working in the boot sequence (I can see the Android logo and the Realme animation): it stops once the Android system is loaded.
So, I tried booting the phone with the combination VOL DOWN + POWER BUTTON but it doesn't work... It seems an issue that afflict some pieces of this phone (read in some post, video I searched before writing here)

Well, how I can in this situation perform a factory reset?

Realme C21-Y RMX3263
32gb-3gb
Android 11
You should be able to boot in to recovery mode where the device is powered off state and when you use key combinations to do

Keep holding the keys even if you see splash screen, untill recovery screen appears

You can also try holding volume key and connecting to computer via USB cable, without needing power button.
 

sverza

Senior Member
Jan 15, 2008
280
40
Unfortunately with this phone (or the Android version installed in the one I have) have some issues and... butroon combinations are not working
I think I've tried in every way, different combinations. No luck

Both (button combination and black screen) seems to be "common" (search on youtube black screen C21-Y) and the only way is to flash it and/or force the factory from PC (I don't have at the moment understood if for thios phone the only factory from PC is working)

Being a sw issue I'm trying to intercept Realme support, before trying any flash or something similar... but after the first answer to my mail they didn't come back again
 

Mauco

Senior Member
May 5, 2019
55
19
I just call Realme support for a similar issue on C21-Y. They tell me this model doesn't have a recovery installed and olny way is to send back to factory and they will provide a factory reset.
What a bad product, no words.