yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S21 Ultra] mpore14:
Maybe try turning off pocket detection (sensors on, when this is on) and GPS. Also have a look at what apps draining your batter
[Samsung Galaxy S21 Ultra] nightoooo:
What is "pocket detection" ?
[Samsung Galaxy S21 Ultra] nightoooo:
My S21 Ultra (Snapdragon) is the same, 4-5 hours of SoT and at the end of the day i have about 25-30% left .. with my older S20 Ultra (Snapdragon) i had like 6-7 hours of SoT and at the end of the day i have about 30-35% left!!! So i am not so happy with S21 Ultra!
[Samsung Galaxy S21 Ultra] MMarkkk:
G998BXXU3AUDA DBT FHD+ 120Hz Exynos
[Samsung Galaxy S21 Ultra] Scepo89:
Hi friends... is this sot normal? I have constantly somewhere about 4,5-5,5 screen on time on my s21 ultra. 120hz, fhd,4g, exynos. I saw that some users have 7+ sot. I mostly use samsung internet app, maybe web browsing drains more battery life?
[Samsung Galaxy S21 Ultra] mirakoolz:
Those using Gsam, how did you get the Phone Radio reading to show anything other than 0%?

i have followed the steps to set up the permissions using adb.

Thank you
[Samsung Galaxy S21 Ultra] iamnotkurtcobain:
Good results. My battery is horrible atm. Just did the OTA Update but even with 60hz battery life sucks atm. I don't want to make a factory reset...
[Samsung Galaxy S21 Ultra] lawtq:
There you go. He finally listened to me after dismissing my battery reset suggestions. I just turned my hearing off to your battery complaints when you rubbished the suggestion and left you to enjoy your bad battery life

Phones deffo need a reset every now and again especially after huge updates if you want best performance.

Glad it's good again
[Samsung Galaxy S21 Ultra] lawtq:
Enjoy the bad battery then. Its annoying, but android just doesn't have a great update process it seems. The amount of times battery plummeted for me in the past after updates is epic
[Samsung Galaxy S21 Ultra] shinsengloomy:
Try clearing the cache. Also there's a new update out again so I recommend updating first before clearing.
[Samsung Galaxy S21 Ultra] fi3ry_icy:
samsung updates almost always made battery life worse
[Samsung Galaxy S21 Ultra] papavales:
you people said to do factory reset after every big update, i have 60 apps with passwords set this is gonna hurt big time. I had 3 huawei devices at the past, i never did factory reset on updates and i had zero issues. Is samsung updates so crappy that ruins the system's stability on every update and needs factory reset?
[Samsung Galaxy S21 Ultra] lawtq:
Sometimes something just goes wrong causing a drain somewhere. It's not regularly in my experience
[Samsung Galaxy S21 Ultra] Quazza:
Something within Android is smashing my battery (all background, sync etc is off )
[Samsung Galaxy S21 Ultra] Veestaai:
Can you provide details inside the android system tab?
[Samsung Galaxy S21 Ultra] franagan75:
Very happy with last may update battery use
[Samsung Galaxy S21 Ultra] cheekrox:
My SOT is amazing. I'm getting 24hours regularly!
[Samsung Galaxy S21 Ultra] Quazza:
This kinda thing ?
[Samsung Galaxy S21 Ultra] MMarkkk:
120 Hz FHD+ G998BXXU3AUE1 SM-G998B/DS (International) Exynos
[Samsung Galaxy S21 Ultra] Quazza:
Anyone got anything on this ? Currently with 52% battery left with 2hours 10 of screen time which is laughable

Exynos, April update
[Samsung Galaxy S21 Ultra] BaltazarIX:
Very similar story in my case. Exynos, April update:

FHD, 120Hz, 4G only, Nearby devices scan off, Wi-Fi energy saving on, Pocket mode off, and probably more settings which I can't remember just to save more battery
[Samsung Galaxy S21 Ultra] Goku1992:
32% left. April Update but with 60 hz...

Nothing to complain. Are you using Facebook instagram ****? Dont use gsam its only eating your battery...
[Samsung Galaxy S21 Ultra] Quazza:
Did you use smart switch to start up ?
[Samsung Galaxy S21 Ultra] walox:
I have the same problem with April update. 50% battery with 2 hours or a little more SOT. I really hope that may update will be better, I've tried everything in this post (factory reset, don't use smart swicth, debloat a lot of samsung apps, etc)

Really really disappointed 😞. In fact, write this post and check some stuff in whatsapp and now I have 96%
[Samsung Galaxy S21 Ultra] BaltazarIX:
You mean the app for copying things from older phone? Yes I've used this but I've copied : photos, videos SMS messages, call registry, some of apps
[Samsung Galaxy S21 Ultra] mtm1401:
I mean your phone has been on for nearly 35 hours including some music streaming which I assume happened whilst the screen was off, that's hardly bad.... SOT is only any use as a metric when used in context with standby, app usage etc.
[Samsung Galaxy S21 Ultra] BaltazarIX:
Yes of course, that's 100% correct.

The different thing is that I never had such big battery usage with Tidal on mine OnsPlus 6, or maybe the statistics are calculated differently on those devices.
[Samsung Galaxy S21 Ultra] Limeybastard:
And we have a winner. Only

Joking this is a Samsung m51
[Samsung Galaxy S21 Ultra] enigmaamit:
Yeah, hopefully.

But I'll wait cautiously before installing the first few builds.

Did you hear about the Android 12 beta bricking the OnePlus 9 series after early adopters jumped and flashed the first beta build? OnePlus has since pulled the update, but all majow platform upgrades are inherently risky in the beginning.
[Samsung Galaxy S21 Ultra] Joloxx9:
Yeah yeah yeah sure, I think every year we can hear same story unfortunately. Even if they improve everything by 50% we will face a dodgy google play services update, or one memory leak etc and we will have even more battery drain than now, then after 6 months when they fix it, there will issue with something else.

I am really sceptic and to be honest, I would like them to not break the battery which is quite good at the moment.
[Samsung Galaxy S21 Ultra] enigmaamit:
Any possibility the Samsung health activity tracker is the culprit trying to count your steps and distance moved?
[Samsung Galaxy S21 Ultra] Goku1992:
Same **** here mate... Idle lying around very good time. Idle moving is only okay...
[Samsung Galaxy S21 Ultra] Joloxx9:
Double tap to wake up on and pocket mode off I guess?
[Samsung Galaxy S21 Ultra] Goku1992:
Wirh pocket mode its using the cam to detect that its in pocket... Double tap to wake off will improve standby?
[Samsung Galaxy S21 Ultra] Joloxx9:
Then turn on touch protection.
[Samsung Galaxy S21 Ultra] Joloxx9:
And? It is 2% per hour, nothing special? Do you know that you still got data/wifi in the background etc?

Did you try naptime? It helps a lot in standby, also create bixby routines when you dont need certain things phone can shut them.

I am going to debloat my phone a bit today, hopefully it will improve battery life.
[Samsung Galaxy S21 Ultra] Goku1992:
Touch protection

Yes cause its using the frontcam 🤣🤣🤣
[Samsung Galaxy S21 Ultra] Goku1992:
Yes it is something special when the phone uses 0,5% and with touch protection 2% its using more🤣 he asked for tipps to improve standby not the opposite🤣
[Samsung Galaxy S21 Ultra] Goku1992:
Sorry my fault mate. But its using more battery.... Testet it a few times...
[Samsung Galaxy S21 Ultra] Sukrith:
This isn't anything new and is synonymous with OnePlus for a long time! Almost every beta (and stable updates thinking of it) or alternate ones brick the phone or cause huge headaches for the users that it's news always... I've done beta testing of all Samsung updates for years and I've never had this big of a problem ever. But ya rogue apps will be there ruining the battery life or performance which can be fixed with a reset or a clean flash!
[Samsung Galaxy S21 Ultra] Goku1992:
Yes oneplus is bad with new Android Updates... Have an 7t mclaren and its a shame... Also New updates arent that fast anymore...
[Samsung Galaxy S21 Ultra] Joloxx9:
It does drain less with it on my side so not sure what is so funny
[Samsung Galaxy S21 Ultra] Goku1992:
On my phone and adamlee2012 its using more. It constantly uses the proximity sensor to detect your pocket... This uses a bit more..
[Samsung Galaxy S21 Ultra] Joloxx9:
You sure that it CONSTANTLY use it? As in previous post you didn't even know that it is using it. As far as I know, sensor is only on when phone detect touch and must "confirm" that it is in pocket etc.
[Samsung Galaxy S21 Ultra] Sukrith:
Is that a contact tracing app? I think it maybe a reason as it continuously scans for nearby apps. Try turning it off and see.
[Samsung Galaxy S21 Ultra] Veestaai:
Check Gsam for more stats
[Samsung Galaxy S21 Ultra] Goku1992:
Not constantly but often...

I have very good battery life without it...

Full hd/60hz newest Update and exynos.

Also uninstalled webview Updates for smoother scrolling on Samsung Internet.

80% wlan (homeoffice in germany) and 20% mobile data. 1/2hour hotspot on
[Samsung Galaxy S21 Ultra] Joloxx9:
I do not complain about battery, 5h sot 4g, out of home with adaptive refresh highest resolution and battery saver(max Hz for adaptive under battery saver). At Home I could hit probably 7 easily, but to be honest. I bought for for 1k gbp not to stick with full HD and 60hz but to use it and be happy. Came from op7pro - great phone with shutty rounded corners and bad camera so 60hz would be like 5 steps back for me.
[Samsung Galaxy S21 Ultra] hsienjuen:
I have previously brought up this issue in another thread.

https://xdaforums.com/t/cameraservice_worker-partial-wakelock.4234161/

Most users don't realise that when the phone is moving (like in the pocket) it activates the camera wakelock preventing it from going into fully idle.

There is no fix around this. Only way is to disable sensors. Hopefully in a future update (which is unlikely) Samsung will fix this stupid wakelock from occuring
[Samsung Galaxy S21 Ultra] Goku1992:
For me 60hz is okay... But yes i also came from 7t mclaren xD
[Samsung Galaxy S21 Ultra] Goku1992:
Developer options. But automatic brightness wont work after that. Also the cam till you reenable sensors
[Samsung Galaxy S21 Ultra] Sukrith:
But still there's a chance it is going to be able to scan given the permissions! Try disabling the app for the time being and see.
[Samsung Galaxy S21 Ultra] Goku1992:
Luckily i havent problems with the battery... This is a pain in the ass :/
[Samsung Galaxy S21 Ultra] johnkabou:
Guys how do you get those? I'm having the Snapdragon and battery has been mediocre at best. The best that I managed was 8 hours SOT with power mode saving mode on (that means 60hz and speed reduced at 70%), 5G off but data, bluetooth and NFC on. Any thoughts? I'm wondering if the device is defective
[Samsung Galaxy S21 Ultra] Quazza:
Ok so I'm hoping when I finally get the May update , it at least slightly helps as this is terrible

If it doesn't help , I guess I'll go the factory reset option as I set up via Smart switch. On that, are you safe then setting up from a saved Google back up ?
[Samsung Galaxy S21 Ultra] Joloxx9:
You have messenger running in the background for 4 hours and you think it is ok?
[Samsung Galaxy S21 Ultra] atcndw:
Guys, do you have any problem with low battery %? It happened twice with me, when the battery decreased to 5% the s21u shut off in less then 5 minutes
[Samsung Galaxy S21 Ultra] enigmaamit:
Since the time I've owned this phone, it's only gone below 20% once. And that was just coz I wanted to push it all the way and see how long it would last. But mine didn't shut down at 5%. It went all the way to 1% before finally turning off. Unfortunately I don't have a screenshot of that. The lowest battery level screenshot i I have is at 3%, which is when the phone was charging up after completely dying - I'm attaching that. Also, most YouTube battery tests on the S21 Ultra also show it going all the way to 1% be before turning off. I have the Exynos version BTW. Turning off before it hits zero indicates improper battery calibration, based on the above information.

Having said that, let me also add that the last 8-10 percentage points fall really fast in this phone - it's a nose-dive. And even if your phone survived below 5% all the way to 1%, it's not going to give you any significant usage or standby time - mine went from 5% to 1% really fast. Same happens in the 100-95% range, the drop is rapid even without much usage. This is the polar opposite of how iPhone and OnePlus phones report their initial and terminal battery levels. I assume this is just how Samsung calibrates it's battery readout.

If you're getting good standby time and SOT, I guess don't think too much about it and just take it through a full charge and discharge cycle to calibrate the battery (just once in 6 months or so, not frequently) and that should keep the battery's level reported fairly accurately.

All this is just an educated guess, and based on personal experience, so YMMV. Let's hear from the other users here about their experience.
[Samsung Galaxy S21 Ultra] johnkabou:
Extremely disappointed. Any thoughts?
[Samsung Galaxy S21 Ultra] atcndw:
Thanks for your answer!

I tried to calibrate the battery after the first time it happened, but didn't worked as I thought it would

It just happened twice because I dont let the battery go so low, normally I charge at 15-20%
[Samsung Galaxy S21 Ultra] Quazza:
I don't know ?

But others in here (including a post just above this ) have it running a lot longer with more screen on time than me
[Samsung Galaxy S21 Ultra] freezingpoint:
If on mobile data the whole time, I'd guess this is normal.
[Samsung Galaxy S21 Ultra] enigmaamit:
I think this is pretty decent battery life. And in line with the average reported by most users I've interacted with. There are a few users here who report 8+ hours SOT but for the majority, 6-7 hours seems like the median. Same for me. I get anywhere between 5:30 to 7 hours SOT depending on usage. I wouldn't call this disappointing battery life... Something like 4 hours SOT would be disappointing. But again, it depends on your expectations from your phone, so I guess it is a matter of opinion.
[Samsung Galaxy S21 Ultra] enigmaamit:
If you're getting good battery life, just ignore this. There isn't much usable battery once it goes 5% anyway. Barely lasts a few minutes.

Are you happy with the overall battery life (besides the shutdown at 5% thingy)?
[Samsung Galaxy S21 Ultra] Quazza:
Hmmmm. I was getting 7-8 hours OST a while ago. Generally on mobile data
[Samsung Galaxy S21 Ultra] Joloxx9:
It maybe stupid, but do you loose first 2% in just couple of minutes after unolugging? It looks like in my case that I can unplug, leave it on my desk and after 10 min there will be 98%?
[Samsung Galaxy S21 Ultra] Goku1992:
100 to 99 in like 10minutes of doing nothing 🤣
[Samsung Galaxy S21 Ultra] freezingpoint:
Is it with the same usage, apps, and reception?

I always find mobile data to be draining especially if using certain apps like Chrome and Facebook.
[Kindle Fire Q&A, Help & Troubleshooting] mrsiri:
Hello,

I was rying to install FireFireFire in my kindle fire 1 gen by doing this guide: https://xdaforums.com/t/how-to-root...flashing-fff-twrp-2015.2814955/#post-54124313

Beforehand I rooted kindle with saferoot successfully.

After device entered fbmode, it shows kindle fire logo and can't be recognized on computer.

How do I exit out of fastboot?

Is it possible to exit with short circuiting to boot via USB? how do I do this?

Kindle version is 6.3.4
[Kindle Fire Q&A, Help & Troubleshooting] sd_shadow:
Root doesn't affect flashing Recoveries or bootloaders

Likely a driver issue, Using Windows 10?

The only way to exit out of Fastboot mode that I know is

fastboot -i 0x1949 oem idme bootmode 4000
fastboot -i 0x1949 reboot
[Kindle Fire Q&A, Help & Troubleshooting] mrsiri:
Thank you for the reply.

I tried using both linux and windows 10 but none detected my kindle.

Can I try the short pin method? Since I never done anything like this before, do I need to ground myself before shorting to not get shocked? since my version is 6.3.4 and the guide had version 6.2.1 idk if I can
[Kindle Fire Q&A, Help & Troubleshooting] sd_shadow:
You don't need to ground your self, you can try the short pin method, it doesn't matter what firmware version is installed.
[Kindle Fire Q&A, Help & Troubleshooting] mrsiri:
Okay I'll try that and report after doing it.

Thank you again
[Kindle Fire Q&A, Help & Troubleshooting] mrsiri:
Shorting the pins before, after and during plug in didn't change anything on screen...

It should at least be detected on computer, but either windows or linux don't show anything.

Since I need to lift the cable slightly up for it to connect to computer, I guess the problem is the port.
[Kindle Fire Q&A, Help & Troubleshooting] sd_shadow:
There were lots of port issue reported over the years, likely the most common thing that let to there retirement.
[Redmi Note 9 Questions & Answers] Shah65367:
I tried to install twrp recovery in my redmi note 9 (merlin) then I lost my device I got hardbrick then i tried to recover unfortunately I formated my via sp flash tool now my mobile is back to life but I have lost Imei only SIM 1 working but UM not able to call with sim1 ND SIM 2 is not working can someone help me?
[Redmi Note 9 Questions & Answers] XDHx86:
Since your device is MTK there are multiple ways to change your IMEI.

You can follow this guide to change your device IMEI back to original. (Changing IMEI to a different value than the default IMEI your device came with is illegal in most countries)

If you hate the technical stuff you can use this guide instead, it claims to be able to change the IMEI back to default value automatically by using baseband. Here is a video guide.

It's untested though so use it on your own risk.

Hope I helped.
[Redmi Note 9 Questions & Answers] Shah65367:
can I recover wifi nvram error...? Via meta tool?
[Redmi Note 9 Questions & Answers] Communos:
How to fix "NVRAM WARNING: Err = 0x10" error permanently.

Telegram Channel: t.me/xiaomiengs THIS TUTORIAL ONLY FOR XIAOMI DEVICES ONLY! (if you have nvram and nvdata backup, just restore it - will fix this issue) Requirements: Computer USB cable Engineering ROM for your device, download here Stock ROM for your device, download here 1. Install...

telegra.ph

This works for NVRAM issue
[Redmi Note 9 Questions & Answers] Shah65367:
LINK IS NOT WORKING
[Redmi Note 9 Questions & Answers] XDHx86:
You can follow this thread to fix this problem. (Literally first google result)
[Redmi Note 9 Questions & Answers] Shah65367:
link is not working why?
[Redmi Note 9 Questions & Answers] VD171:
It requires hydra dongle https://www.hydra-dongle.com
[Redmi Note 9 Questions & Answers] Shah65367:
PLZ TELL ME WITHOUT DONGLE ITS NOT POSSIBLE...? IS THERE ANY CRACK TOOL? I DONT HAVE MONEY I WANNA REPAIR FREE OF COST
[Redmi Note 9 Questions & Answers] VD171:
You can repair only imei for slot2 by yourself.

Only Xiaomi Centre can recover imei for slot1.

If you want to recover the imei for slot2, just follow this step:

1. Flash the ENGINEERING ROM: https://xdaforums.com/t/engineering...for-merlin-redmi-note-9-redmi-10x-4g.4227933/

2. Enter in META MODE using MODEM META: https://androidmtk.com/download-modemmeta-tool

3. Write IMEI for slot2 and keep blank/null for slot1.

4. Flash any other MIUI (or custom) ROM you want.

5. Backup NVDATA if you want to restore IMEI after.

Done.
[Redmi Note 9 Questions & Answers] Shah65367:
JUST TELL ME LAST THING...IF I DO NOT FLASH ENGINEERING ROM THEN I CANNOT
[Redmi Note 9 Questions & Answers] VD171:
No. Because that the step 1 is "Flash the ENGINEERING ROM".

Meta mode is not allowed on release versions.
[Redmi Note 9 Questions & Answers] Shah65367:
H0W T0 BACK UP NVRAM DATA ND HOW TO BACKUP IN OFFICIAL ROM?
[Redmi Note 9 Questions & Answers] VD171:
You can do that using TWRP or SP FLASH TOOL, read this: https://xdaforums.com/t/guide-how-t...-on-merlin-redmi-note-9-redmi-10x-4g.4230423/
[Redmi Note 9 Questions & Answers] Shah65367:
ENGINEERING ROM NOT FLASHING VIA SP FLASH TOOL "CMD BROM ERROR"
[Redmi Note 9 Questions & Answers] VD171:
Try this: https://xdaforums.com/t/guide-how-t...for-merlin-redmi-note-9-redmi-10x-4g.4238161/
[Redmi Note 9 Questions & Answers] Shah65367:
GETTING THIS ERROR SEE SCREEN SHOT THEN I TRIED IN FIRMWARE UPGRADE THEN SP FLASH SHOWING "DA 100% DONE" View attachment 5250249
[Redmi Note 9 Questions & Answers] VD171:
If you are facing the PMT changed error, you are using a different scatter file than used before.

You just need to use the SAME scatter file.

Here, you can find scatter file for MERLIN: https://xdaforums.com/t/scatter-fla...omi-redmi-note-9-xiaomi-redmi-10x-4g.4223097/
[Redmi Note 9 Questions & Answers] Shah65367:
I unzipped engineering rom if I will flash other scatter file then METAMOD will not detect my device....totally confused right not
[Redmi Note 9 Questions & Answers] VD171:
First, use the meta as you want.

Second, backup the NVDATA partition.

Third, flash the another firmware you want to use.

Fourth, restore the NVDATA partition.

Done :-)
[Redmi Note 9 Questions & Answers] Shah65367:
BRO HOW CAN I USE META WHILE UM UNABLE TO FLASH ENGINEERING ROM WITHOUT ENGINEERING ROM I CANT USE METAMOD...I HAVE ATTACHED SP FLASH ERROR IN LAST REPLY...I THINK I HAVE TOF FLASH ENGINEERING ROM VIA MI FLASH UM GOIN TO UNLOCK BOOTLOADER AFTER THAT I WILL GET BACK TO UH IF I GOT ERROR OR SOMETHING ELSE
[Redmi Note 9 Questions & Answers] VD171:
Here, you can find the solutions for your errors: https://xdaforums.com/t/guide-how-t...for-merlin-redmi-note-9-redmi-10x-4g.4238161/
[Redmi Note 9 Questions & Answers] Shah65367:
UH DIDN'T GET ME...I AM FACING PMT CHANGED ERROR TO SOLVE THIS ERROR I HAVE TO CHANGE SCATTER FILE BUT THIS IS ENGINEERING ROM'S FILE IF I CHANGE THEN I CANNOT REPAIR IMEI BECAUSE METAMOD WORKS IN ENGINEERING ROM
[Redmi Note 9 Questions & Answers] VD171:
You have everything you need.

Just read and use your creativity.
[Redmi Note 9 Questions & Answers] Shah65367:
BRO I FLASHED ENGINEERING ROM VIA NI FLASH TOOL AFTER UNLOCKING BOOTLOADER SUCCESSFULLY INSTALLED THEN I REPAIR IMEI SUCCESSFULLY REPAIRED I DIALED *#06*

IMEI RESTORED...BUT BEFORE RESTORING SIM 1 WAS WORKING BUT AFTER RESTORING SIM 1 WAS NOT WORKING

NOW I INSTALLED OFFICIAL VERSION THEN I FORMATED AGAIN VIA SP FLASH COZ SIM 1 WAS NOT WORKING...AFTER FORMATTED VIA SP FLASH NOW SIM 1 IS WORKING I CAN USE INTERNET 😭...
[Redmi Note 9 Questions & Answers] VD171:
I can't solve your problems.

You need to solve your problems.

Read and pay attention.

Read again and pay more attention.

Good luck

https://xdaforums.com/t/guide-how-t...-on-merlin-redmi-note-9-redmi-10x-4g.4230423/

https://xdaforums.com/t/guide-how-t...for-merlin-redmi-note-9-redmi-10x-4g.4238161/

https://xdaforums.com/t/scatter-fla...omi-redmi-note-9-xiaomi-redmi-10x-4g.4223097/
[Redmi Note 9 Questions & Answers] Communos:
You're supposed to leave SIM1 IMEI blank while restoring through meta, only put SIM2 IMEI and the checksum, Sim2 will work fine then :)
[Redmi Note 9 Questions & Answers] mudaran:
hi, i lost imei and flashed chinese rom. Can I restore the same imei by doing these actions? does the internet work?
[Redmi Note 9 Questions & Answers] VD171:
Yes.

You can repair only imei for slot2 by yourself.

Only Xiaomi Centre can recover imei for slot1.

If you try to write the imei for slot1, you will get NV DATA corrupted and your device will be bricked in a bootloop.

If you want to recover the imei for slot2, just follow this step:

1. Flash the ENGINEERING ROM:

V1: https://xdaforums.com/t/v1-engineer...for-merlin-redmi-note-9-redmi-10x-4g.4227933/

V2: https://xdaforums.com/t/v2-engineer...for-merlin-redmi-10x-4g-redmi-note-9.4246901/

2. Enter in META MODE using MODEM META:

Download: https://androidmtk.com/download-modemmeta-tool

Guide: https://androidmtk.com/use-modem-meta-tool

3. Write IMEI for slot2 and keep blank/null for slot1.

4. Backup NVDATA partition.

5. Flash any other MIUI (or custom) ROM you want.

6. Restore NVDATA partition.

Done.
[Redmi Note 9 Questions & Answers] Shah65367:
I PUT SIM1 IMEI T00...CAN UH TELL ME WHEN WE CLICK ON DB LOAD WHICH FILE WE SHOULD SELECT I AM LITTLE CONFUSED...TELL ME EXACT FILE NAME
[Redmi Note 9 Questions & Answers] VD171:
If you read, you will know what to do.