Rollback from Nougat (EMUI 5.0) to Marshmallow (EMUI 4.0) - Mate 8 Q&A, Help & Troubleshooting

Hey guys,
I have a big problem with my Mate 8. My build number was NXT-L29 C636 B170 and I never got any updates, because I was using this asian build with a european SIM-card. Because of these annoying notification bugs B170 has and because I was about to factory reset my phone I thought about updating it manually.
Tried to understand how all this works and started to do a small OTA update first to test if it's that easy. With the B180 from the screenshot of FF below I easily managed to update my phone.
What I tried next is to go to Android 7.0, so I used the selected blue FullOTA-MF-PV. My phone updated successfully and works really smooth, but now I see "NRD90M test-keys" as build number. I read a lot of bad things about this version because it seems to be a really early and bugged beta version and thats not what I need. I already wanted to try a factory reset but also read that you should completely avoid doing that.
I want to go back before anything unsuspected happens to my phone. My updater has gone, so I cannot install anything else. Can anyone explain for a newbie how to get back to my previous build?
Was it wrong to use the PV version?
What I want to reach then is an updated version of my phone software as a stable version.
Hope anyone can save my phone
Thanks in advance
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Related

OTA update

I got an OTA update today. 920d. With updates to the camera app and some other stuff. Now on 1.12.707.1.sense 45_4
Really? I am on 1.12.707.1 sense 45_4 out of stock. I have Butterfly x920d for 3 weeks already and my location is Vietnam.
Just check and found no new update!?!
What?...
just received update on my butterfly.. its 1.19.707.1
me too. waiting to see if it has moved up beyond android 4.1.1...
Heres the update, maybe its just preparing the phone for Sense 5:
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yup,hope so.. hoping that sense 5 will be available as soon as possible.. sense 4+ beginning to bored me...
New 1.19.707.1 Update
Kernel and Baseband seems to be updated.
EDIT: HBOOT also updated to 1.41
Mine is rooted!
Mine is rooted with TWRP installed; followed the instruction in the development section (how to unroot butterfly), but TWRP still installed, anything is missing, how can I restore the flash recovery?
False Alarm
dan.lotfy said:
Mine is rooted with TWRP installed; followed the instruction in the development section (how to unroot butterfly), but TWRP still installed, anything is missing, how can I restore the flash recovery?
Click to expand...
Click to collapse
False Alarm, the following 2 threads are perfect:good::
http://forum.xda-developers.com/showthread.php?t=2157029
http://forum.xda-developers.com/showthread.php?t=2173931

New Update Certified for Xperia M2 Dual [D2302]

New firmware certified for Xperia M2 Dual (18.3.1.B.1.8)
Screenshot
View attachment 3148047
Source
I gues this will be another 4.4.4
I think so too. Lollipop has a long way to come. But even though, lollipop doesn't support Xposed also i read somewhere that memory leaks are present in it so in a way it's not fully stable. I hope it is just another 4.4.4
Vtrendzzy said:
I think so too. Lollipop has a long way to come. But even though, lollipop doesn't support Xposed also i read somewhere that memory leaks are present in it so in a way it's not fully stable. I hope it is just another 4.4.4
Click to expand...
Click to collapse
Yes, it's expected to be another KitKat, according to XperiaBlog: http://www.xperiablog.net/2015/02/03/minor-xperia-m2-dual-update-certified-18-3-1-b-1-8/
For me, the current version of KitKat is stable. Wonder what bugs they have selected to fix. I encounter only one problem and that's not working of navbar while any video is playing in fullscreen.
There are certified updates for D2303/6 as well, I suspect as much that D2305 has it too. Well, just wait.
Me using 4.4.4 KitKat is kinda slow in certain points, which is weird. But, hope this update fix some bugs D:
It is slow after some time
to now what changes in new kernel in this update just translate this post http://4pda.ru/forum/index.php?s=&showtopic=577504&view=findpost&p=37796957
Nothing yet:
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http://www.scavenger.ch/xperiaupdate/check.php?model=D2302&id=1280-6952 (Singapore)
http://www.scavenger.ch/xperiaupdate/check.php?model=D2302&id=1281-2402 (USA)

SM-N915V -- Downgraded from 6.0.1 to 4.4.4 with mixed results

So, this is a little bit odd.
I have long since moved from using a Samsung phone as my daily driver, but still use my Note Edge while on the go as a mobile sketchbook. Well, last night I accidentally approved the OTA update that had been pending on my phone for several years straight, which updated my device to Marshmallow. The 6.0.1 update caused my performance to tank hardcore, to the point where it's borderline unusable and my battery drains in less than an hour. Unacceptable.
I used Odin to flash back to 4.4.4. I grabbed a stock ROM for my device and Odin 3.12.7, put it into recovery mode, and started the process. Surprisingly, everything went off without a hitch and I found myself with a green PASS box and no errors in the Odin log. Sweet.
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However, something's not right. I'm still on Marshmallow, but with all of the old KitKat apps having replaced the ones that updated. All of the icons are their older versions and even the system font is back to its old thick, round self. The OTA update is back, somehow, and my phone's About page says I'm still on 6.0.1. User data was also not touched. The baseband of the phone matches the file I used, so I definitely flashed the ROM.
Obviously I missed a step. I thought this process would factory reset my device?

Can this phone be upgraded to a newer version of Android

I have this phone known as an i13 Plus. System information states its an Alps i13 Plus. It has Android 8.1 but would like to upgrade it to 9 or more. I dont know if this is phone is known as any other makes or if it can be upgraded at all. Screen shots included.
What I cant work out is that the phone information in settings states that it is running Android 8.1 Oreo. Hitting that repeatedly brings up the oreo cookie pic. However, Device Info HW is stating that it is Android 4.4.2 so Im a bit confused!
Update: Phone is running Android 8.1 but is running a system UI of Android 4.4.2 Kit Kat!
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IMO basically every phone's Android can get upgraded ( keyword: Custom ROM). Of course a matching Custom Recovery ( like TWRP ) must get flashed before.
jwoegerbauer said:
IMO basically every phone's Android can get upgraded ( keyword: Custom ROM). Of course a matching Custom Recovery ( like TWRP ) must get flashed before.
Click to expand...
Click to collapse
Trouble is I do not know what brand this phone is. Alps does not come up under any of the phone listings in the TWRP site. I have also looked under Welcome brand. Can not find anything.
That's your cheap Chinese low-end phone
https://www.aliexpress.com/item/1005001357288658.html
IMO you shouldn't waste your time trying to upgrade it.
Id like to try.. it was free after all. LOL

Which stock firmware to download?

I am preparing to bootloader unlock and root my note 20 ultra Sm-n9860 on Android 10 TGY csc.
In both samfirm and phone info app I am seeing two such firmware, both have same pda, csc and other details.
Can someone tell me which one should I download?
Phone info app. Shows manufacturing date6as 2020.12.16
In about phone security patch date is Nov, 1,2020.
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I don't know for sure but think there is no actual difference. I've unlocked my bootloader and rooted being on latest 1CUA3 (11 Android) TGY without any issues. Then flashed 10 Android just to check some things and then flashed 11 Android back. Why do you want to use 10 android firmware? Want to stay on that version after root?
a43 said:
I don't know for sure but think there is no actual difference. I've unlocked my bootloader and rooted being on latest 1CUA3 (11 Android) TGY without any issues. Then flashed 10 Android just to check some things and then flashed 11 Android back. Why do you want to use 10 android firmware? Want to stay on that version after root?
Click to expand...
Click to collapse
Yes currently on Android 10 and want to stay on it.
Will uogrwde once all bugs have been smoothed out.
Kinda like Android 10 stability and battery life
I got it. Then I would take the latest upload just in case. By the way, what's the name of app you use for this? I'm usually downloading to my PC using Frija app for Windows.

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