Develop Bugs

OTA update to N

Hello everybody, it is time to update to Nougat and I'm ready to do it.
According to this thread https://forum.xda-developers.com/showpost.php?p=59745198&postcount=3
I need a system_image and stock recovery backup for being able to do an OTA.
I did it and I must restore the system_image and the stock recovery as written in point 8.
But according to this other thread https://forum.xda-developers.com/showpost.php?p=64299835&postcount=4
in Hidden Content point 13, I must backup the system_image, the stock recovery and the boot image.
I have only backupped system_image and recovery and I can download boot.emmc.win from the second thead, but I wish to ask:
Is it really necessary to restore boot.emmc.win? Now I'm on ViperOneM9 4.3.0
Why @Captain_Throwback didn't mention it in his official TWRP thread?
I thank you in advance anyone may help me to get the OTA in the right way

Balteck said:
Hello everybody, it is time to update to Nougat and I'm ready to do it.
According to this thread https://forum.xda-developers.com/showpost.php?p=59745198&postcount=3
I need a system_image and stock recovery backup for being able to do an OTA.
I did it and I must restore the system_image and the stock recovery as written in point 8.
But according to this other thread https://forum.xda-developers.com/showpost.php?p=64299835&postcount=4
in Hidden Content point 13, I must backup the system_image, the stock recovery and the boot image.
I have only backupped system_image and recovery and I can download boot.emmc.win from the second thead, but I wish to ask:
Is it really necessary to restore boot.emmc.win? Now I'm on ViperOneM9 4.3.0
Why @Captain_Throwback didn't mention it in his official TWRP thread?
I thank you in advance anyone may help me to get the OTA in the right way
Click to expand...
Click to collapse
If I didn't mention it, then you don't have to do it .

@Captain_Throwback can you maybe explain that a little further? I made the experience that people are facing problems if they return from a custom rom to a stock rom and don't wipe their phone. That's why I added the wiping step to my instructions. After that several users reported that their phones didn't boot after they restored the first version of my backups (which lacked the boot.img). Therefore, I thought the boot.img is needed as well and all backups got replaced over a year ago with the current version which includes the boot.img.
However, all this is based on the reports of users who had problems with returning back to stock. I've never faced these issues myself. So if there is anything wrong with my instructions I'll correct them, of course.
Sent from my HTC One M9 using XDA Labs

I thought it's impossible to backup the stock recovery seeing as twrp is needed to be flashed to make the backup..
Beamed in by telepathy.

shivadow said:
I thought it's impossible to backup the stock recovery seeing as twrp is needed to be flashed to make the backup..
Beamed in by telepathy.
Click to expand...
Click to collapse
Since firmware 3.x you can boot TWRP via fastboot from the bootloader without overwriting the currently installed stock recovery.

Flippy498 said:
@Captain_Throwback can you maybe explain that a little further? I made the experience that people are facing problems if they return from a custom rom to a stock rom and don't wipe their phone. That's why I added the wiping step to my instructions. After that several users reported that their phones didn't boot after they restored the first version of my backups (which lacked the boot.img). Therefore, I thought the boot.img is needed as well and all backups got replaced over a year ago with the current version which includes the boot.img.
However, all this is based on the reports of users who had problems with returning back to stock. I've never faced these issues myself. So if there is anything wrong with my instructions I'll correct them, of course.
Click to expand...
Click to collapse
Not sure what to explain - OTA does no verification on boot.img. So it doesn't have to be stock for an OTA to install. It's that simple.

Captain_Throwback said:
Not sure what to explain - OTA does no verification on boot.img. So it doesn't have to be stock for an OTA to install. It's that simple.
Click to expand...
Click to collapse
OK. I guess there was a little misunderstanding.
The current version of my instructions is meant to be used if you want to return to a clean stock system. (In other words the ability to install OTAs, again, is only a side effect.) I never was talking about the boot.img being necessary for being able to install the OTA. I thought you were saying that the boot.img wouldn't be needed inside a backup if you do a full wipe before the restoration and that the phone would still boot.
Sent from my HTC One M9 using XDA Labs

I'm little confused now.
For installing an OTA update I MUST have an untouched system partition and stock recovery.
But the steps I need to do are:
1) backup apps and settings
2) restore untouched system partiton and stock recovery partition from TWRP, doing a factory reset (wipe data, dalvik and cache)
3) boot the original stock OS, configure wifi and go to Software Update
4) download OTA(s)
5) apply update and reboot phone
6) with ADB start TWRP recovery and backup the new stock recovery and the new stock system_image
7) flash TWRP and new custom ROM
8) restore apps and settings from point 1)
So, is it possible that at step 3 my HTC cannot boot because I didn't restore the boot partition (I'm coming from ViperOneM9 4.3.0)?
Or is there a simpler method, without backuping, wiping, restoring?

Flippy498 said:
Since firmware 3.x you can boot TWRP via fastboot from the bootloader without overwriting the currently installed stock firmware.
Click to expand...
Click to collapse
Looks liks i used an out of date tutorial then.. What a bugger..
Beamed in by telepathy.

Anyone can confirm me that my previous steps are right?
So I may uodate to Android n without doubt
Thank you very much

How to restore to stock version(stock recovery and stock eui) without losing IMEI?

Hi,
I have custom ROM installed, I need to know the exact steps to restore the phone as it was stock with recovery and stock MIUI OS.
like do I need to flash stock recovery first, then flash MIUI OS or few other steps to make sure I should not lose my IMEIs ?
Thanks

Technically you won't loose IMEI by flashing roms unless you goof up. You can flash MIUI on any recovery and don't forget to backup your data. I would recommend not using MI Recovery because MIUI ROMs have reached EOL for this device and you might want to try something else soon. There's also a fix to restore IMEI here https://www.gizdev.com/repair-imei-snapdragon-device/

What TWRP are people using for curtana?

Hi all, I'm currently running miui EU rom 11.0.11 with bootloader unlocked and TWRP installed. However there are so many different twrp recoveries available all with different things working....
So far I've only flashed one rom since I've got the phone but with all these amazing looking custom ROMs around, I'd like to try out a few but it seems backup and restore is currently not possible.
TLDR: anyone know of a TWRP with working backup for Xiaomi redmi note 9s CURTANA?
Cheers

1qazwsx4 said:
Hi all, I'm currently running miui EU rom 11.0.11 with bootloader unlocked and TWRP installed. However there are so many different twrp recoveries available all with different things working....
So far I've only flashed one rom since I've got the phone but with all these amazing looking custom ROMs around, I'd like to try out a few but it seems backup and restore is currently not possible.
TLDR: anyone know of a TWRP with working backup for Xiaomi redmi note 9s CURTANA?
Cheers
Click to expand...
Click to collapse
You should use the latest recovery version available, I think now is the OrangeFox recovery, it's the unified (miatoll) version. To can make backup, the recovery need to able to handle the encryption installed by ROM. To restore the backup... another challenge. I using only data backup and when want to restore, I wipe data, flash the rom, wait for first boot (set same pin code as used in backup), than restore the data in recovery. In case of unlucky situation (encryption difference between "restored" and previous rom, the rom stuck at first boot and need to format data partition (will delete internal storage too!!).

I use ofox recovery, having stock rom in an sd card and migrate backup I just flash new rom and when I want to come back, I flash stock and restore migrate. Nandroid backups are a bit risky I think.

Hi somebody can help me?

My Question is About Twrp, if i make a Back-up of my system completery, and install a ROM and not liked her or bricked my device (Mi a2 Lite) i can take back again, right? without install a ROM stock? Thansk for Answering ? i make one time but Using a Clockwordmod on samsung Old i bricked the device and i Restore a Backup and Back
Sorry about My english bad

Yes, but use unofficial TWRP from ROM section not the official one.
Backup boot, system image, vendor image and data.
Works for custom ROMs, not sure about stock ROM.
Also backup EFS and persist once in case you lost IMEI or sensors.

Pat750 said:
Yes, but use unofficial TWRP from ROM section not the official one.
Backup boot, system image, vendor image and data.
Works for custom ROMs, not sure about stock ROM.
Also backup EFS and persist once in case you lost IMEI or sensors.
Click to expand...
Click to collapse
I unlocked my bootloader yesterday and my user data and files have not been deleted
but my other question is If i install twrp i lose?

[email protected] said:
I unlocked my bootloader yesterday and my user data and files have not been deleted
but my other question is If i install twrp i lose?
Click to expand...
Click to collapse
I'm surprised that unlocking didn't delete your data, for me it did and it usually does.
For TWRP use fastboot boot <filename>.img to boot it and then flash the zip.
Normally that doesn't delete data, but always backup important data first.
I'm not sure how good TWRP handles encrypted data...I'm always unencrypted.
Before TWRP backup people say to remove pins and maybe fingerprints first (there are zip files for that) because then restoring will work better.
Good luck, happy flashing and first search and read if you are unsure.

Pat750 said:
I'm surprised that unlocking didn't delete your data, for me it did and it usually does.
For TWRP use fastboot boot <filename>.img to boot it and then flash the zip.
Normally that doesn't delete data, but always backup important data first.
I'm not sure how good TWRP handles encrypted data...I'm always unencrypted.
Before TWRP backup people say to remove pins and maybe fingerprints first (there are zip files for that) because then restoring will work better.
Good luck, happy flashing and first search and read if you are unsure.
Click to expand...
Click to collapse
before i Unlock the BL i pressed the button "Down" of sound and not deleted My Data :3

Question How does restoring work in this phone?

For context, I want to clear up a few things before trying to root so I don't end up bricking the phone.
So after reading a few threads it seems even recovering via twrp is messed up in this phone. Can someone shed some light on this matter?
Can I restore system, data, and boot partitions via twrp in case something goes wrong (while staying on official miui roms everytime, I don't intend to install custom roms) and I have to revert the phone back to the state it was in at the time of a backup?
It feels like at the very least we would be required to re-flash the entire firmware via mi flash tool and then restore whatever is needed via twrp later. Will this work?
Also I hear using twrp to install the official firmware is not a good idea, what's that about?
I know long post and a lot of questions, so please bear with me.
Thanks.

Custom ROMs and Stock ROMs differ in one aspect, which partitions are left untouched. Since stock ROM is a lot more invasive and formats all partitions, official flash method is recommended.
When you mess things up, mi flash tool is safest option. Its safe to experiment, backup, restore on boot+system+data in TWRP across ROM installs but don't mess up recovery partition. Remember to format data between ROM installs unless dirty flashing on same android version

miravision said:
Custom ROMs and Stock ROMs differ...
Click to expand...
Click to collapse
I see. Thank you for the reply!