Downgrade from Android 10(Q) to Android 9(PIE) 750FN - Samsung Galaxy A7 (2018) Questions & Answers

As you can all see there is android 10 out.
Just wanted to warn all of you who like to switch often from android 9 to android 10 and vice versa, that the first firmware for most of the countrys that came out on Sammobile is A750FXXU4.... which means the bootloader is Rev.4 the same like for the last Pie rom
That means you can rollback to last Pie firmware from Q with Odin.
Eventualy samsung will update firmwares with new bootloader, security fixes, and ect...
So it means if you update your firmware with rev.5 bootloader when it comes out, you will newer be able to go back to Pie.
Some of you probably know that, but there are others who dont know that so just to be careful.

i want to ask question .. samsung provided device update that includes Android 10 for Galaxy A7 2018 ,, and with this update Device becomes slow .. games become to lag alot .. it takes a lot of time to switch from rear camera to front camera these problem were not there when the device was android 8 and 9 ..
and i add to add one more thing that i was using the device care widget of the phone itself .. which told 2.6 to 3 .0 gb free RAM in case of Android 8 and 9 .. and since the Android 10 maximum RAM I have free is only 1.6GB even after FACTORY RESETTING and REBOOTING the device .. what should i do ??

I'm will not recommend to upgrade Pie to Android Q because its still buggy.

Related

Updating Android 5.0 to Android 6.0 or higher on Medion E4503

I want to install special Android version: Android 9 Pie GO because it has lower requirements 512 MB of RAM . My phone has 1GB of RAM but problem is I don't see option how to do that.
My phone: Medion E4503 doesn't seem to be supported on twrp website for making recovery point first. I don't see it under devices. I heard this phone may just be rebrand of Lenovo phone (dunno which one ) but I have no way of telling which Lenovo version may work if at all. And that is just pre- install part. Then I also don't see where to find custom ROM for this device. I only see bunch of other ROMs for other phones. I have Android 5.0 and banking application now require Android 6.0+ . I do not want to buy new phone just for that because I rarely use phone at all.

Samsung SM-970U S10e snapdragon downgrade ?

Hi I have a samsung SM-970u ( s10e snapdragon TMO) is there a way to make a downgrade form android 11 to android 10 ?
I...wondered the exact same thing....
but even with an unlocked bootloader it doesn't seem possible if your bootloader version is too high...it was possible when Android 11 first came out but versions may have changed now. I tried flashing with odin myself but I'm getting sw rev check fail... even with an unlocked bootoader.
I'd love to be wrong cause I want stock android 10 but i can't find info otherwise.
Deathlan said:
Hi I have a samsung SM-970u ( s10e snapdragon TMO) is there a way to make a downgrade form android 11 to android 10 ?
Click to expand...
Click to collapse
What's your current Build/Baseband?
I was wondering if I can downgrade from 12 to 9.
But as I'm reading a lot of posts, I'm guessing it will be next to impossible?
Build: SPA1.210812.016.G970FXXUEGVA4
Baseband: G970FXXUEGVA2
Cilvaring said:
I was wondering if I can downgrade from 12 to 9.
But as I'm reading a lot of posts, I'm guessing it will be next to impossible?
Build: SPA1.210812.016.G970FXXUEGVA4
Baseband: G970FXXUEGVA2
Click to expand...
Click to collapse
You can never officially downgrade more than one version.
The only possibility would be to unlock the phone's bootloader and flash a custom ROM based on Android 9. But I do not even know if it is theoretically possible to run an Android 9 ROM on an Android 12 bootloader
iBowToAndroid said:
You can never officially downgrade more than one version.
The only possibility would be to unlock the phone's bootloader and flash a custom ROM based on Android 9. But I do not even know if it is theoretically possible to run an Android 9 ROM on an Android 12 bootloader
Click to expand...
Click to collapse
From what I've learned the phone has a version of the bootloader.
In my case that's version 14 (resp. E because it's hexadecimal)
I found that f.e. Android 11 was released in versions that had different bootloader versions (9, A, B, C, D & E).
So I was only able to install the Android 11 that came with bootloader version E.
And as it stands now, it seems like it's impossible to downgrade the bootloader which in the end makes it a huge pile of s**t on Samsung's or even Google's end.
It's kinda the Apple way of doing things and not letting you do what you wish...
Cilvaring said:
It's kinda the Apple way of doing things and not letting you do what you wish...
Click to expand...
Click to collapse
Kind of. Except:
1. Apple doesn't let you downgrade firmware at all
2. Apple doesn't offer unlockable bootloaders and therefore there's no possibility of a custom ROM
Cilvaring said:
From what I've learned the phone has a version of the bootloader.
In my case that's version 14 (resp. E because it's hexadecimal)
I found that f.e. Android 11 was released in versions that had different bootloader versions (9, A, B, C, D & E).
So I was only able to install the Android 11 that came with bootloader version E.
And as it stands now, it seems like it's impossible to downgrade the bootloader which in the end makes it a huge pile of s**t on Samsung's or even Google's end.
It's kinda the Apple way of doing things and not letting you do what you wish...
Click to expand...
Click to collapse
It's a cruel lesson. Android becomes more Apple than Android with each upgrade.
Literally the first thing I do on a new Samsung is package block OTA updates.
I have two N10+'s, one running on 9, the other 10.
They will stay on that firmware.
iBowToAndroid said:
Kind of. Except:
1. Apple doesn't let you downgrade firmware at all
2. Apple doesn't offer unlockable bootloaders and therefore there's no possibility of a custom ROM
Click to expand...
Click to collapse
Well yes, but the fact that google's core apps are not open source and more and more APIs or libraries are only available on phones that have certain pre-installed google apps takes a big piece of liberty out of android.
My bet also is, it won't get better since google just won't stop generating money in new ways day after day.
But: Android still is a whole lot better than the half-eaten piece of fruit. No doubt.
blackhawk said:
It's a cruel lesson. Android becomes more Apple than Android with each upgrade.
Literally the first thing I do on a new Samsung is package block OTA updates.
I have two N10+'s, one running on 9, the other 10.
They will stay on that firmware.
Click to expand...
Click to collapse
I hear you.
Was running a S7 with Oreo before I switched to the S10e now and it will stay on Oreo until it dies as a backup phone.
Sadly the seller of the S10e already had updated it to 12, so I'm stuck with at least 11 due to the bootloader.
Cilvaring said:
I hear you.
Was running a S7 with Oreo before I switched to the S10e now and it will stay on Oreo until it dies as a backup phone.
Sadly the seller of the S10e already had updated it to 12, so I'm stuck with at least 11 due to the bootloader.
Click to expand...
Click to collapse
Android 11 was one reason I bought a new N10+ about 5 months ago versus a N20U. I thought new N10+ be running on 9 but it ended up loaded with 10 due to the manufacturing date. It turned out ok.
I learned the hard way with Samsung and upgrades 6 years ago... and was about as happy as you.
Unfortunately many of the resellers will load whatever is the latest OS version when they test out a phone.
It's more than just a little aggravating. Forget the Google bs hype... I still remember the horror of MS Vista
Hopefully you'll find workarounds to iron out the rough edges or if it really gets on your last nerve return or resell it. Life's too short to live with a phone you hate.

Samsung M30, tactility impossible to work on android 10

hello, urgent help me. I have a samsung M30 which I flash with an android 10 binary 6 rom. and after the tactility of my phone no longer works. I want to bring the system back to android 9, but I can't.
please give me any solution, waiting for your answer
Re-flash phone's Stock ROM by means of ODIN.
it is in android 10 I want to make it under android 9, I am told that the binary of android 9 is lower

Help downgrading encrypted bootloader samsung phone.

Hi all !
Hope everyone have a great day, i have got a samsung galaxy A6 US variant TMB, (SM-A600T) with android version 9, I was trying to root the phone but didn't have the knowledge that this phone can't be rooted because of locked bootloader which can't be unlock with any procedure. So i gave up and just updated my phone to the latest version available of PIE . (Android 9), To tell you more, before it was also on the same version of android 9 but earlier date. I have not updated a whole version of android but just to a latest date of android 9, Android 10 is also available for this phone but i haven't done that yet. The main problem with my phone is that before this update i just needed to charge my phone once in 24 hours, and now after update i need the same phone with same demands to charge it 3 times in 24 hours, Did every optimization for battery, unused apps, extra apps uninstalled, just one google account left, synchronization is off, NFC and near scanning is off, Bluetooth / Wifi is off, GPS is off. Auto update for apps and system software is off. Battery saving mode is enabled, clear cash has been done, factory reset is already done with flashing this version of android with odin tool, and etc every other thing has been tried with no luck, please don't advise for these things as the main problem for me is just the android version itself which i have newly flashed. Because of locked bootloader i can't flash back my older version of android 9 with odin tool, phone gives error of bootloader :
sw rev check fail device 2 binary 5​something like above after many tries the same result. tried my old firmware with the new bootloader but still no luck. (Same error). Any help or suggestions will be greatly appreciated. I am thinking what if i extract the AP of the new flashed firmware and replace the system.img.lz4 with my old firmware's system.img.lz4 to trick the phone and reflash with the new firmware but old system image file, Can this be done ? or i may brick my phone for ever ? what if i take my phone to the outside market and request a z3x flash for the old firmware version ? will that work ?
Please give any accurate solution i really want my old phone back, this locked bootloader has become a really annoying thing for me. I will never buy a phone like this which bootloader's can't be open again. Or if i wasn't able to flash this to my old version i will never use android again in my life, Better option will be to buy an iphone after 17 years of android use.
Thanks in advance.

Manually install android 12 on note 20 ultra live demo unit running android 10

Hi, so I have a Note 20 ultra Live demo unit N985F/DS. I make calls, everything is working. However it's on android 10 and not getting any prompts for updates. I want to manually install android 12 and would like to know how to go about it and if it being an LDU has any complications to it. Thanks in advance for any contributions
Technically seen moving from Android 10 to Android 12 is an UPGRADE, not an update.
Updates ( read: patches to existing Android OS ) get rolled out by OEM if they deem it necessary.
If you find both a Custom Recovery and a Custom ROM - based on Android 12 - what is sutitable to mentioned device you can start to upgrade at your own.

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