how to update unlocked MT2-L03 to latest lollipop B322 - Huawei Ascend Mate 2

my mate 2 is still in the original Android version 4.3. I never updated it. Now I am thinking to update the phone to latest Lollipop B322, May I know how I can do it? Will this update reset my phone to the factory mode? How can I still recover my phone to the current state after updated to new Lollipop? Sorry for my naive questions. Thanks in advance for your help!

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If your on 148, I think you need to hit an intermediate update first. It will reset your phone to stock, but you can install TWRP backups. Not sure if you can restore old system images. I know the partition sizes get larger on android 5 builds
Sent from my Ascend Mate 2 using Tapatalk

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Do clean installs only. So backup everything first. A backup of all apps can be useful as it was for me but some apps from jelly bean didn't work on lollipop and I had to find and alternative. Some apps just had errors and I just had to re downoad them from the play store. So backup first. Also the custom recovery you have on 4.3 will need to be updated for newer ROM on this phone. Use your old twrp first to back up your stock 4.3 first.
Then go like this:
Build 148 ->
Build 309 (lollipop)
Factory reset (repartitions internal storage) ->
Build 322 (gives you new bootloader) ->
Factory reset (so all is ready) ->
All set to install custom ROM. Update your custom recovery to the one the ROM you want requires.
Remember to do clean installs and wipe cache and davlik. If you use xposed flash the ROM, Gapps and xposed then so you don't have to wait on Android to rebuild the davlik cache later when you've restored your 100+ apps (takes a while).
@superbass311 made a bunch of YouTube videos to get you updated. They're in the how to guide thread
http://forum.xda-developers.com/showpost.php?p=61682557&postcount=7

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how can I root official b322 ?
thanks

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notoriouspk said:
how can I root official b322 ?
thanks
Click to expand...
Click to collapse
If I remember right you can install a custom recovery TWRP and then boot into TWRP and it will ask if you want to root. There are other options to root the phone as well. I just flashed from B322 -> custom rom which was already rooted. If you're staying on stock b322 though I think TWRP will do it for you.

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arcadesdude said:
Do clean installs only. So backup everything first. A backup of all apps can be useful as it was for me but some apps from jelly bean didn't work on lollipop and I had to find and alternative. Some apps just had errors and I just had to re downoad them from the play store. So backup first. Also the custom recovery you have on 4.3 will need to be updated for newer ROM on this phone. Use your old twrp first to back up your stock 4.3 first.
Then go like this:
Build 148 ->
Build 309 (lollipop)
Factory reset (repartitions internal storage) ->
Build 322 (gives you new bootloader) ->
Factory reset (so all is ready) ->
All set to install custom ROM. Update your custom recovery to the one the ROM you want requires.
Remember to do clean installs and wipe cache and davlik. If you use xposed flash the ROM, Gapps and xposed then so you don't have to wait on Android to rebuild the davlik cache later when you've restored your 100+ apps (takes a while).
@superbass311 made a bunch of YouTube videos to get you updated. They're in the how to guide thread
http://forum.xda-developers.com/showpost.php?p=61682557&postcount=7
Click to expand...
Click to collapse
arcadesdude said:
If I remember right you can install a custom recovery TWRP and then boot into TWRP and it will ask if you want to root. There are other options to root the phone as well. I just flashed from B322 -> custom rom which was already rooted. If you're staying on stock b322 though I think TWRP will do it for you.
Click to expand...
Click to collapse
thanks for ur response Twrp asked if I want to root it ..it booted fine but no SU ...checked root it wasn't there ....at the moment I am running cm 13.0 rooted which works fine ...can u give me a link for stock rooted B322 ? thanks
btw which is better cm 13 or B322 rooted ?

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notoriouspk said:
thanks for ur response Twrp asked if I want to root it ..it booted fine but no SU ...checked root it wasn't there ....at the moment I am running cm 13.0 rooted which works fine ...can u give me a link for stock rooted B322 ? thanks
btw which is better cm 13 or B322 rooted ?
Click to expand...
Click to collapse
If TWRP root didn't work you can flash SuperSU.zip file using TWRP.
http://forum.xda-developers.com/ascend-mate2/help/how-one-root-upgraded-to-5-1-t3148167
http://androiding.how/how-to-flash-supersu-using-twrp-recovery-and-root-any-android-device/
A limitation of B322 over a custom rom like CM is that Xposed doesn't work on B322. So if you want lots of features and customization go with a custom rom like CM13 (which I will eventually be upgrading to it is just a lot of work to migrate 200+ apps & settings lol). A positive of B322 is EMUI (Huawei's stock rom aka B322) is extra battery life. I hear that CM13 is just as good in that regard but I haven't tried it yet. So I'd say a custom rom would be better than stock B322 (even if it is rooted) just because of the ability to use Xposed.

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Thank you so much for your reply! I am still having two questions:
1. Before upgrade, i should backup data. Can I just use the backup function in handset which i found from Settings/About phone/System Update/Local Update/? I don't know about TWRP.
2. to upgrade from B148 to B322, can I just follow this instruction: http://consumer.huawei.com/us/support/manuals/detail/index.htm?id=52025&key4=mate 2
4.1 Force upgrade
---Step 1. A MICRO SD card of 4G or more should be available. The MICRO SD card
made by Sandisk, Kingstone, or Kingmax is recommended.
---Step 2. Format the MICRO SD card (This operation is optional).
If your phone’s system is B3XX, you should skip Step 3 and Step 4.
---Step 3. Copy the Software: recovery package file UPDATE.APP and main package file
UPDATE_VENDOR.APP to a directory named dload.
---Step 4. Copy the entire dload folder (with UPDATE.APP and
UPDATE_VENDOR.APP in it) to the root directory of the MICRO SD card.
If your phone’s system is B126 or B148, you should skip Step 5.
---Step 5. Copy the upgrade package UPDATE_VENDOR.APP to a directory named
dload and copy the dload folder to the root directory of the MICRO SD card.
---Step 6. Make sure your handset is power off. Insert the MICRO SD card into the
handset. Press the VOLUME UP and VOLUME DOWN keys and POWER key to
power on the phone(picture4.1.1) , when the HUAWEI logo is showed , release
the POWER key and keep pressing the VOLUME UP and VOLUME DOWN
keys(picture 4.1.2) until your phone is entered the Software Upgrade
Software Upgrade Guideline
2015-9-3 Page 5, Total8
Mode(picture 4.1.3).
4.1.1 4.1.2
4.1.3
---Step 7. When the progress bar stops, your handset will reboot and enter the new
system.
Thanks!!
arcadesdude said:
Do clean installs only. So backup everything first. A backup of all apps can be useful as it was for me but some apps from jelly bean didn't work on lollipop and I had to find and alternative. Some apps just had errors and I just had to re downoad them from the play store. So backup first. Also the custom recovery you have on 4.3 will need to be updated for newer ROM on this phone. Use your old twrp first to back up your stock 4.3 first.
Then go like this:
Build 148 ->
Build 309 (lollipop)
Factory reset (repartitions internal storage) ->
Build 322 (gives you new bootloader) ->
Factory reset (so all is ready) ->
All set to install custom ROM. Update your custom recovery to the one the ROM you want requires.
Remember to do clean installs and wipe cache and davlik. If you use xposed flash the ROM, Gapps and xposed then so you don't have to wait on Android to rebuild the davlik cache later when you've restored your 100+ apps (takes a while).
@superbass311 made a bunch of YouTube videos to get you updated. They're in the how to guide thread
http://forum.xda-developers.com/showpost.php?p=61682557&postcount=7
Click to expand...
Click to collapse

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Best to have a full system backup using TWRP. Also having a full backup from Titanium Backup will allow you to restore apps which can be faster than installing them over. If you don't have too many apps it isn't a big deal. It does let you save app settings.
Also use an app to back up phone log and sms if you want that history.
I don't know about the built in backup. Haven't used it.
piapiaworld said:
Thank you so much for your reply! I am still having two questions:
1. Before upgrade, i should backup data. Can I just use the backup function in handset which i found from Settings/About phone/System Update/Local Update/? I don't know about TWRP.
2. to upgrade from B148 to B322, can I just follow this instruction: http://consumer.huawei.com/us/support/manuals/detail/index.htm?id=52025&key4=mate 2
...
Click to expand...
Click to collapse
You can do that. I think that will work. You might have to flash it twice if there are issues after the first time. Then once it is B322 do a factory reset/restore just in case as well. All data is lost in the process of upgrading.

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arcadesdude said:
If TWRP root didn't work you can flash SuperSU.zip file using TWRP.
http://forum.xda-developers.com/ascend-mate2/help/how-one-root-upgraded-to-5-1-t3148167
http://androiding.how/how-to-flash-supersu-using-twrp-recovery-and-root-any-android-device/
A limitation of B322 over a custom rom like CM is that Xposed doesn't work on B322. So if you want lots of features and customization go with a custom rom like CM13 (which I will eventually be upgrading to it is just a lot of work to migrate 200+ apps & settings lol). A positive of B322 is EMUI (Huawei's stock rom aka B322) is extra battery life. I hear that CM13 is just as good in that regard but I haven't tried it yet. So I'd say a custom rom would be better than stock B322 (even if it is rooted) just because of the ability to use Xposed.
Click to expand...
Click to collapse
Thanks for those important pointers and the OP for this topic.
I also like my 2 year old HAM2 so much i just picked up another one as a fallback device perhaps if not daily handset.
I will leave that one JellyBean but i do plan to upgrade the next one to Lollipop 322 i hope.
On the old Mate 2 i flashed through TWRP the very latest SuperSU zip 2.76 i think.
I assume it's best to always use the latest version of it? Is that ok?

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Mirror-Mirror said:
Thanks for those important pointers and the OP for this topic.
I also like my 2 year old HAM2 so much i just picked up another one as a fallback device perhaps if not daily handset.
I will leave that one JellyBean but i do plan to upgrade the next one to Lollipop 322 i hope.
On the old Mate 2 i flashed through TWRP the very latest SuperSU zip 2.76 i think.
I assume it's best to always use the latest version of it? Is that ok?
Click to expand...
Click to collapse
I also have a backup HAM2...very useful phone and must props to the devs for working on all the custom recoveries, roms and apps which help make our phones really customizable and usable.
Yes. Update SuperSU using the zip in TWRP 'install.' I just upgraded my own phone to CM13.0 (snapshot) and it fixed some issues (with other issues remaining...always a tradeoff lol!). SuperSu latest version works great! It's a good idea to use the newest version but remember if it isn't broke why take the chance to upgrade it and make it broken?

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arcadesdude said:
I also have a backup HAM2...very useful phone and must props to the devs for working on all the custom recoveries, roms and apps which help make our phones really customizable and usable.
Yes. Update SuperSU using the zip in TWRP 'install.' I just upgraded my own phone to CM13.0 (snapshot) and it fixed some issues (with other issues remaining...always a tradeoff lol!). SuperSu latest version works great! It's a good idea to use the newest version but remember if it isn't broke why take the chance to upgrade it and make it broken?
Click to expand...
Click to collapse
It's been a long time since I bothered with ROM's, rooting etc. but another MT2-L03 in the stable demanded to get those hands dirty again.
As usual I errored some things a little, lost root, and even managed to muff TWRP backups with Error 255 or whatever. But Mate 2 is ever so forgiving. It was just a matter of reflashing the Stock Recovery and then firmware, Factory Reset, and install anew the UPDATE.APP+VENDOR (aka:Lollipop!) redo which cleaned everything out so that TWRP 3.02 installed and backed up as expected as well as ROOTED!! :good:
It took getting onboard the L24-LIW Honor 5X to make me appreciate the Mate 2 even more.