Stock ROM downgrade - Lenovo P2 Guides, News, & Discussion

Hi all.
As many others I'm experiencing the impossibility to sync Google addressbook with my Lenovo P2. So I decided to unblock the bootloader even if this make the warranty to be lost, because I absolutly need the sync. Unfortunately also the possibility to ask for the oem unblock of the bootloader is nt possible at the moment (see threads on this topic here and at Lenovo Community)..
I suppose that going back to a previous official ROM doesn't help because the impossibility to sync started a long time *after* the last official update of P2, ie November 2017.
Anyway my question is: is it possible to try to install an old version of the original Lenovo P2 FW, without problems? I was successful with Asus, Sony and others smartphone but I have no experience with Lenovo.
TIA.
Topoldo

I don't see why it wouldn't work. As long as the bootloader isn't unlocked you shouldn't have any problems.

You can downgrade but it will not help. I downgrade to 6.0 and gooogle contact sync still not work.

tr4usut2 said:
You can downgrade but it will not help. I downgrade to 6.0 and gooogle contact sync still not work.
Click to expand...
Click to collapse
contact sync won't work in 7.0 s251 either.

Related

Inquiry about OPPO R7plusf update!

Hi guys,
I hope all of you are fine, now after more than one year of usage of OPPO R7Plusf which was really amazing, it seems like OPPO has no plans to upgrade our phones, when I purchased my device a ColorOS version 2.0 was installed already and recently, it was upgraded to ColorOS version 2.1.0i (based on 5.1.1 Android Lollipop). Nowadays, all of us heard about the Nougat upgrade when we still dreaming with Marshmallow!!
So please, any suggestions for a custom ROM (tested) to upgrade my OPPO phone to Nougat version with no usual known errors or bugs. I will be grateful.
Notice: I contacted both customer support (the local one and the international) and I received the usual formal disappointed answer: "we will inform you when the update is available", which I think it will not be.
So thanks
Anybody here!?
Depends what you like
I currently use Resurrection remix on mine however there are some issues with apps force closing is my main one. Lineage OS also had issues for me with bluetooth causing the phone the reboot over and over. CM 13 was the best but I can't find any download links for it any more (rip CM) I think they both have updates coming outside but I recommend trying some out and then making a decision. Also if your phone is on one of the latest oppo updates (one of the 2016 updates) you'll have to downgrade to a 2015 software as they locked the bootloader so you won't be able to root! It's easy to do just find an old firmware from the internet (I would post links but I can't, also has to be a 2015 one) turn off the phone and turn it back on whilst holding down the volume down button and then go install and install the old firmware and then follow any guides on the internet for installing custom ROMs
Hope this helped
Meroslave said:
Anybody here!?
Click to expand...
Click to collapse
Lol, yeah. There is not much traffic here, but the R7Plusf is still awesome and up to date. Mainly due to good people at LineageOS keeping the device fresh.
I don't have serious issues with AICP on Nougat. No reboots. It is build "on top of" LineageOS, but have more features plus a working theming system. Latest build uploaded today.
Try RR, AICP and LineageOS and see what you like. Wait with Lineage untill the next release (current is Feb 14), if you want to avoid reboots.
ccrocks426 said:
I currently use Resurrection remix on mine however there are some issues with apps force closing is my main one. Lineage OS also had issues for me with bluetooth causing the phone the reboot over and over. CM 13 was the best but I can't find any download links for it any more (rip CM) I think they both have updates coming outside but I recommend trying some out and then making a decision. Also if your phone is on one of the latest oppo updates (one of the 2016 updates) you'll have to downgrade to a 2015 software as they locked the bootloader so you won't be able to root! It's easy to do just find an old firmware from the internet (I would post links but I can't, also has to be a 2015 one) turn off the phone and turn it back on whilst holding down the volume down button and then go install and install the old firmware and then follow any guides on the internet for installing custom ROMs
Hope this helped
Click to expand...
Click to collapse
So, you recommend the CM13 in case it's available?
And what's the cons and pros?
teemo said:
Lol, yeah. There is not much traffic here, but the R7Plusf is still awesome and up to date. Mainly due to good people at LineageOS keeping the device fresh.
I don't have serious issues with AICP on Nougat. No reboots. It is build "on top of" LineageOS, but have more features plus a working theming system. Latest build uploaded today.
Try RR, AICP and LineageOS and see what you like. Wait with Lineage untill the next release (current is Feb 14), if you want to avoid reboots.
Click to expand...
Click to collapse
Sure I will try one of your recommendations, but all I was afraid of was the disappointed bugs after updat such as battery drain, camera errors, wifi issues ... etc. Of course my ColorOS became boring to me, but still stable with no errors
Any pros or cons for those above I will be great full
Meroslave said:
Sure I will try one of your recommendations, but all I was afraid of was the disappointed bugs after updat such as battery drain, camera errors, wifi issues ... etc. Of course my ColorOS became boring to me, but still stable with no errors
Any pros or cons for those above I will be great full
Click to expand...
Click to collapse
Battery drain on MM has improved compared to Lollipop and N has improved over MM. With 4 email accounts running (on Aqua Mail) and Location on "High accuracy", Viber messenger and other stuff running, I had not much drain on AICP 11 (MM). Drain during night with Location on "Device" was 0.5% per hour. On MM and especially N, you have many ways in settings you can fine tune battery drain. Many apps are automatically shut down when not in use. You can decide which to limit and which to keep running when phone is off. Without extra apps (as ColorOS has), you can limit what apps are allowed to do and see. All built into the system.
A final word on drain: With Googles and others services running all the time, tracking everything you do, some drain is expected. Luckily this can be turned off by you
The number one reason to upgrade in these hacker friendly times: N is updated with much improved security. Updated every month with the latest security patches.
For me, AICP 11 is error free. The latest MM builds are complete in features and practically error free. Features are still being merged one at the time on N, but is useable as is now with only some minor issues.
I have not tried RR. My guess is that it has more features than AICP, but also more issues.
Lineage is the mother of all, I expect it to be stable with a good set of features.
All the N builds have more or less issues with speaker-phone. It may or may not bother you (or the person in the other end). MM was not affected as much as N, for some unknown reason.
I use Resurrection Rom and very happy with this rom!
i am beginer
i have oppo r7 plus f. tried the auto root tool but ended up hard bricking my phone. i am a beginer and i do not have much knowledge .
want to install lineage os on my oppo r7 plus f please tell me some easy ways.
Meroslave said:
Hi guys,
I hope all of you are fine, now after more than one year of usage of OPPO R7Plusf which was really amazing, it seems like OPPO has no plans to upgrade our phones, when I purchased my device a ColorOS version 2.0 was installed already and recently, it was upgraded to ColorOS version 2.1.0i (based on 5.1.1 Android Lollipop). Nowadays, all of us heard about the Nougat upgrade when we still dreaming with Marshmallow!!
So please, any suggestions for a custom ROM (tested) to upgrade my OPPO phone to Nougat version with no usual known errors or bugs. I will be grateful.
Notice: I contacted both customer support (the local one and the international) and I received the usual formal disappointed answer: "we will inform you when the update is available", which I think it will not be.
So thanks
Click to expand...
Click to collapse
supriyo_rana said:
i have oppo r7 plus f. tried the auto root tool but ended up hard bricking my phone. i am a beginer and i do not have much knowledge .
want to install lineage os on my oppo r7 plus f please tell me some easy ways.
Click to expand...
Click to collapse
Rana, first I'm sure you have been a good phone user and your Oppo R7 plus is upto date, unfortunately this is a problem. So first thing you need to do (Assuming you have unbricked your phone) is find a older version of the genuine R7+ firmware. Preferably some time between 2015- mid2016. The reason for this is OPPO locked the bootloader on later versions, these earlier versions are what the autoroot tool was designed to work on. Once you have this firmware, flash through recovery (provided you still have genuine OPPO recovery), if not you also need to flash this. Once you have the older firmware on your phone you should be able to proceed as usual steps to install lineage on your phone using typical walkthroughs.
what to do next?
DooganAU said:
Rana, first I'm sure you have been a good phone user and your Oppo R7 plus is upto date, unfortunately this is a problem. So first thing you need to do (Assuming you have unbricked your phone) is find a older version of the genuine R7+ firmware. Preferably some time between 2015- mid2016. The reason for this is OPPO locked the bootloader on later versions, these earlier versions are what the autoroot tool was designed to work on. Once you have this firmware, flash through recovery (provided you still have genuine OPPO recovery), if not you also need to flash this. Once you have the older firmware on your phone you should be able to proceed as usual steps to install lineage on your phone using typical walkthroughs.
Click to expand...
Click to collapse
thanks for your reply
yeah i went to the ofiicial service centre for the unbricking , noy it is working fine with letest firmware . now according to you i should downgrade the firmware . but how to do it ? should i do it via oppo stock recovery? or via the local update option of system updater in the menu?
supriyo_rana said:
thanks for your reply
yeah i went to the ofiicial service centre for the unbricking , noy it is working fine with letest firmware . now according to you i should downgrade the firmware . but how to do it ? should i do it via oppo stock recovery? or via the local update option of system updater in the menu?
Click to expand...
Click to collapse
i have the same concern also. Can someone please provide a step by step instruction on how to downgrade the firmware to the old version?
supriyo_rana said:
thanks for your reply
yeah i went to the ofiicial service centre for the unbricking , noy it is working fine with letest firmware . now according to you i should downgrade the firmware . but how to do it ? should i do it via oppo stock recovery? or via the local update option of system updater in the menu?
Click to expand...
Click to collapse
bu11et said:
i have the same concern also. Can someone please provide a step by step instruction on how to downgrade the firmware to the old version?
Click to expand...
Click to collapse
Try here: https://forum.xda-developers.com/showpost.php?p=73786100&postcount=139
unlock bootloader still stuck..
Hi Guys..
First i don't know if i am posting this in right thread or not... but I need help... after lots of search i couldn't find anything to unlock my oppo R7 plus running r7plusEx_11_160922 on color os 2.1.o1 android 5.1.1.. As per my study the first thing I need to do it unlock bootloader, then do TWRP, then install any custom rom. (Please correct me if m wrong). Now please tell me how can i unlock my bootloader when I dont have access to fastboot by pressing power and Volume + key. Is there some other way. I have also tried the adb version 1.4.3 to get to the fastboot mode but it restarts my mobile to lock screen.
x_master1987 said:
Hi Guys..
First i don't know if i am posting this in right thread or not... but I need help... after lots of search i couldn't find anything to unlock my oppo R7 plus running r7plusEx_11_160922 on color os 2.1.o1 android 5.1.1.. As per my study the first thing I need to do it unlock bootloader, then do TWRP, then install any custom rom. (Please correct me if m wrong). Now please tell me how can i unlock my bootloader when I dont have access to fastboot by pressing power and Volume + key. Is there some other way. I have also tried the adb version 1.4.3 to get to the fastboot mode but it restarts my mobile to lock screen.
Click to expand...
Click to collapse
Download this rom https://www.dropbox.com/s/xmh77xyinz2iero/R7plusfEX_11_OTA_012_all_201512251816.zip?dl=0. Place it in your internal drive and flash it. It will install the ColorOS with an unlockable bootloader.
Even I'm facing the same issue. There are no such methods available on internet. I have ended bricking phone several times. Because since the last update oppo had limited tho access to bootloader. And the phone OPPO r7 plus f is quite old now so there's no people dealing with the issue. The only methods remain is to downgrade the firmware and repay the process again. Better look for some firmware version around mid 2015-2016early. I read somewhere that has access to bootloader. I haven't tried it personally but I hope the methods will work. Please let me know whatever the result is..
need your help badly
ccrocks426 said:
I currently use Resurrection remix on mine however there are some issues with apps force closing is my main one. Lineage OS also had issues for me with bluetooth causing the phone the reboot over and over. CM 13 was the best but I can't find any download links for it any more (rip CM) I think they both have updates coming outside but I recommend trying some out and then making a decision. Also if your phone is on one of the latest oppo updates (one of the 2016 updates) you'll have to downgrade to a 2015 software as they locked the bootloader so you won't be able to root! It's easy to do just find an old firmware from the internet (I would post links but I can't, also has to be a 2015 one) turn off the phone and turn it back on whilst holding down the volume down button and then go install and install the old firmware and then follow any guides on the internet for installing custom ROMs
Hope this helped
Click to expand...
Click to collapse
please pm me your email . i have an oppo r7 plus f (the international version ) and i do not have much knowledge about the rooting and installing custom recovery. and since oppo has closed the bootloader now please tell me which rom to download for downgrading( if possible please provide the link) and then how to flash the custom roms and which rom is best for oppo r7 plus? which one are you using?
DooganAU said:
Rana, first I'm sure you have been a good phone user and your Oppo R7 plus is upto date, unfortunately this is a problem. So first thing you need to do (Assuming you have unbricked your phone) is find a older version of the genuine R7+ firmware. Preferably some time between 2015- mid2016. The reason for this is OPPO locked the bootloader on later versions, these earlier versions are what the autoroot tool was designed to work on. Once you have this firmware, flash through recovery (provided you still have genuine OPPO recovery), if not you also need to flash this. Once you have the older firmware on your phone you should be able to proceed as usual steps to install lineage on your phone using typical walkthroughs.
Click to expand...
Click to collapse
Where can i find the 2015 firmware for oppo r7 plus f
Just check the link in my post above.
kishd said:
Just check the link in my post above.
Click to expand...
Click to collapse
Don't know why but the link is not working

Can I repair my cell phone?

Greetings to the people of the forum I am new so I apologize if I commit any lack
My case is so try to update my Huawei CHC-u03 to lollipop and marshmellow with the method of honor 4c
all good up to lollipop and a minor update, then when installing marshmellow (all this from sd with the method from the settings of the mobile) the phone is in bootlog and only says honor
I have not been able to revive it with any firmware from the 3 button method, I have tested with firmware 4.4, 5.1.1 and nothing the phone is still in bootlog
when forcing install from sd only says software install failed
* my biggest mistake was that I do not realize that the mobile is not root and has the bootloader blocked without possibility of unlocking because it has imei and serial number changed
Then can I fix it? or should I call it dead?
sorry i used google translate
When you say with the Honor method do you mean you flashed another phone's ROM on your device?
Sent from the beige bra section at Target.
Ac.3 said:
When you say with the Honor method do you mean you flashed another phone's ROM on your device?
Sent from the beige bra section at Target.
Click to expand...
Click to collapse
So is
and I was able to update it to lollipop without problems
the error appeared after forcing the update to marshmellow
luigy95 said:
So is
and I was able to update it to lollipop without problems
the error appeared after forcing the update to marshmellow
Click to expand...
Click to collapse
You should never at any case use another phone's ROM on your device as it will cause lot of problems including hard bricking
Sent from the beige bra section at Target.
luigy95 said:
Greetings to the people of the forum I am new so I apologize if I commit any lack
My case is so try to update my Huawei CHC-u03 to lollipop and marshmellow with the method of honor 4c
all good up to lollipop and a minor update, then when installing marshmellow (all this from sd with the method from the settings of the mobile) the phone is in bootlog and only says honor
I have not been able to revive it with any firmware from the 3 button method, I have tested with firmware 4.4, 5.1.1 and nothing the phone is still in bootlog
when forcing install from sd only says software install failed
* my biggest mistake was that I do not realize that the mobile is not root and has the bootloader blocked without possibility of unlocking because it has imei and serial number changed
Then can I fix it? or should I call it dead?
sorry i used google translate
Click to expand...
Click to collapse
Android devices are not like PCs. You can't just install whatever operating system you want. Android is built for the specific hardware and device model number it is installed on, it is not built to work on other devices. It typically destroys a device when you flash a stock firmware or ROM from a different model number.
Your only hope is to flash your ORIGINAL stock firmware for your specific model number.
DO NOT CONTACT ME VIA PM TO RECEIVE HELP, YOU WILL BE IGNORED. KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE

Nokia 3 8.0 Root - Is there a working method, or NOT?

Hello,
this is the very first time here at XDA Developers Forum that I do not find clear information about rooting a smartphone. I am talking about this Nokia 3 updated with OREO 8.0. Only a lot of confusion reading your posts, sirs. Nobody that is telling if rooting this model is possibile or not. So... can anyone says if it is possibile and how to do that, in a clear and simple manner?
Thanks and regards!
jimgordon said:
Hello,
this is the very first time here at XDA Developers Forum that I do not find clear information about rooting a smartphone. I am talking about this Nokia 3 updated with OREO 8.0. Only a lot of confusion reading your posts, sirs. Nobody that is telling if rooting this model is possibile or not. So... can anyone says if it is possibile and how to do that, in a clear and simple manner?
Thanks and regards!
Click to expand...
Click to collapse
here you go
https://forum.xda-developers.com/nokia-3/how-to/guide-how-to-flash-twrp-magisk-t3785768
this thread should be on Q&A.
Hello,
thanks for your reply. I already read this thread.
So since I am on OREO, it seems I have firstly to downgrade to Nougat. Can someone please tell me how to do that, posting links to the official 7.0 rom, the software and a short guide? Somewhere I read you have to use OST, somewhere else SP Flash Tool...
Thanks in advance and regards
Cosimo
Hello again...
I am trying to downgrade my Nokia 3 8.0 to Nougat, in order to unlock the bootloader.
I have searched a lot for an official 7.0 rom... nothing official... I tryed to follow this guide:
https://forum.xda-developers.com/nokia-3/development/nokia-3-official-firmware-india-uae-t3674320
Managed to install and get a working copy of OST. Connected and start flashing the rom NE1-147I-ind-0-00WW-B02.nb0 (the one I thought it was the earlier one, since nobody wrote "7, 8, or another number" in the file name). OST got stuck at "Reflash service bootloader..."
Can anyone please write a clear guide on how to proceed to root a Nokia 3 OREO that was never ever unlocked before (i mean with bootload never unlocked)? I am going crazy, really...
jimgordon said:
Hello again...
I am trying to downgrade my Nokia 3 8.0 to Nougat, in order to unlock the bootloader.
I have searched a lot for an official 7.0 rom... nothing official... I tryed to follow this guide:
https://forum.xda-developers.com/nokia-3/development/nokia-3-official-firmware-india-uae-t3674320
Managed to install and get a working copy of OST. Connected and start flashing the rom NE1-147I-ind-0-00WW-B02.nb0 (the one I thought it was the earlier one, since nobody wrote "7, 8, or another number" in the file name). OST got stuck at "Reflash service bootloader..."
Can anyone please write a clear guide on how to proceed to root a Nokia 3 OREO that was never ever unlocked before (i mean with bootload never unlocked)? I am going crazy, really...
Click to expand...
Click to collapse
flash UAE version of nb0 if IND doesn't flash, that's Android 7.0 May 2017 Security Patch, unlock and lock bootloader there and apply OTA updates from notification up to latest update. Then follow guide.
SkaboXD said:
flash UAE version of nb0 if IND doesn't flash, that's Android 7.0 May 2017 Security Patch, unlock and lock bootloader there and apply OTA updates from notification up to latest update. Then follow guide.
Click to expand...
Click to collapse
Hi, thanks again for your precious support. Can you give me a link to download the UAE version of the firmware? At this address: https://mega.nz/#F!1ENgnThL!FyL9uYCC3Dq-16elThKAPg I can only find the IND one.
Regards
jimgordon said:
Hi, thanks again for your precious support. Can you give me a link to download the UAE version of the firmware? At this address: https://mega.nz/#F!1ENgnThL!FyL9uYCC3Dq-16elThKAPg I can only find the IND one.
Regards
Click to expand...
Click to collapse
oh they deleted it it was before. I have it on PC, but PC can't turn on.
I have found the file elsewhere... NE1-147C-UAE-0-00WW-B01.nb0
I have tried to upload using OST, and got the same result: stuck at "Reflash service bootloader..."
Is there someone that can help me?
jimgordon said:
I have found the file elsewhere... NE1-147C-UAE-0-00WW-B01.nb0
I have tried to upload using OST, and got the same result: stuck at "Reflash service bootloader..."
Is there someone that can help me?
Click to expand...
Click to collapse
which ost la version you have?
I finally managed to downgrade to Nougat 7.0.
Now, in order to get root, do I have to unlock bootloader first? Can I obtain the code only via a request to the_laser (that didn't answer me) or can I use an online tool ?
jimgordon said:
I finally managed to downgrade to Nougat 7.0.
Now, in order to get root, do I have to unlock bootloader first? Can I obtain the code only via a request to the_laser (that didn't answer me) or can I use an online tool ?
Click to expand...
Click to collapse
you need to unlock bootloader first, and you can PM code i will send you key, use only OTA through notification, don't use OST LA for this guide.
Can you tell the way you downgraded ur Nokia 3
jimgordon said:
I finally managed to downgrade to Nougat 7.0.
Now, in order to get root, do I have to unlock bootloader first? Can I obtain the code only via a request to the_laser (that didn't answer me) or can I use an online tool ?
Click to expand...
Click to collapse
Hi,
can u tell me the method in which you downgraded Nokia 3 from 8.0 to 7, also were u able to unlock the boot loader and root the device. Waiting for your reply as one of my friend also wanna do the same.

help for updating FRD-L09c185 to android oreo

hi guys, I`ve read a lot of post about upgrading to android oreo but since bootloader unlocking is not work any more, I`m wondering are there another ways to do it or not? I`ve tried changing dns which provided by find firmware team, and using hisuite v5 to do it. it completely download FRD-L09c432b562 and install it on my phone but it comes with data corrupted page and phone brick and made me to install official FRD-L09c185B403 throw erecovery. please let me know if there is a way to install oreo. thanks.

Unlock bootloader confusion

Hey Guys,
I have been googling for a while now and I seem to constantly come across conflicting and at times worrying posts which has very much left me stuck right were I am. I just recently purchased a Mate 9 in the hope I would be able to, like all my previous mobiles install a custom rom and tweak it to my specific needs. This however hasn't been the case.
Firmware:
System 8.0.0.046
Dataver MHA-L09 8.0.0.371(C34)
Things that have been tried:
1. No I didn't get a boot unlocker code from the Huawei
2. Yes I have contacted them personally via two different channels and both returned with a we are happy to give it to you, that's not an issue, but this code doesn't exist anymore.
3. DC-Unlock tool didn't detect my mobile in manufacture mode, in which I found another forum post stating to use HCU 3.22 client instead which worked to the point of detecting my mobile, but told me that the current security patch not supported.
4. Contacting DC-Unlock, told me there is no ETA on getting this patch level to work
5. I have read people downgrading to a previous version, unlocking and then installed the custom rom via HiSuite, this doesn't give me that option.
6. I have read people downgrading to a previous version, unlocking and then installed the custom rom via firmware finder.
6.1 Issues with this is that I seen someone claim to upgrade to version 8.0.0.3.75, which is higher then mine, which enabled the rollback feature, is this correct?
6.2 Issues with this is that I have read that gpu turbo has been enabled and many have warned that rolling back to a pre-gpu turbo enabled firmware will brick you mobile and would result in a motherboard needing to be replaced for nearly the cost of the mobile itself.
I am tempted to try another site which I can't remember the name of, which if you pay considerably more then DC-Unlock. at least if they can't get the code, would be refunded. but I think that site is down now as I feel they were playing on people who didn't know how to have done it for free via the Huawei site back in 2018.
So I want to know is there a safe way to unlock my bootloader I think my only option is option 6 but just want more details from others who have done it this way before, or have I pretty much exhausted all my option and just bite the bullet and upgrade to 9.0.1.187 and possibly further through the OTA update process and just enjoy the mobile for what it is and it's limitations?
Thanks again.
You can try the spoofing method here on xda I updated from 8 to 9 with that, as long as firmware finder says your imei is approved
mucski said:
You can try the spoofing method here on xda I updated from 8 to 9 with that, as long as firmware finder says your imei is approved
Click to expand...
Click to collapse
Thanks for that, I can already upgrade to 9, my system updates app is just waiting for me to accept. The issue is that I don't want to go forward. I really want to go backwards, so I can unlock my bootloader first. I'm already at the stage where I have tried most if not all the safe ways to unlocking my bootloader, but with my currently installed android version I can't. The only way forward for me it seems is the firmware finder app and SD force flash back to EMUI 5 aka Android 7 to use DC-Unlocker to unlock it first, then that gives me the freedom of installing the official Android 9 or openkirin.
I just worried as some people have stated that if you attempt a downgrade after a specific point, something about GPU turbo being enabled in later firmwares, which will brick your mobile.
I just want to hear from others who have done this successfully or if it's not possible in my case.

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