Huawei P7 L10: Update and Reset: Cust fail - Huawei Ascend P7

I updated from B136 to B839 via Local Update.
At 99% the Update aborted and the P7 said: update fail, cust fail
I tried a reset and here is the same: cust fail.
The B839 is working so far, but there are some bugs only I have.
I tried to downgrade to 4.4 via local update with the transitionpackage from Huawei, but the same:
Update fail.
Could anybody help me, please?

Follow this guide:
https://rejzor.wordpress.com/2015/12/03/update-huawei-ascend-p7-l10-to-android511/
I had tons of problems because I also updated from B135 directly to B830. But downgrading back, installing the CUST fix and upgrading up again fixed it. Hope it helps.

Is there no way to easily flash the fitting CUST-Version for B852?

pokko said:
Is there no way to easily flash the fitting CUST-Version for B852?
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Unfortunately no, I don't think there is. B621 is the only I've ever seen.

I updated from B136 directly to B839 (Full) via Local Update and then to B852 (70MB-file) also Local Update.
So I have to downgrade to B830 first, then to B621?
CUST-Hotfix not needed?
After that I can upgrade to B839 with the Full-Version (local Update) without first upgrading to B830 and then to B852 with the update-file?
Do I have to handle it with Local Updates or are force Updates also possible?

Yeah, downgrade back to B621 (I had to go back in exact steps I used to go forward, meaning B839->B830->B621), install B621 CUST fix, install B830 and then you can either use full B839 to be sure like I did or you can go B830 -> B839 OTA -> B852 OTA (currently B852 only comes in OTA version).
Sometimes, if downgrading step fails, just keep repeating it. Eventually it will work. Not sure why this happens, but it does.

Ok, so my plan looks like this:
Unrooting my device by flashing Stock Recovery Emui3.1 via ADB
Factory Reset
Downgrading directly to B621 via Force Update
Factory Reset
Installing B621 CUST-Fix
Factory Reset
Update to B839 with Full B839 via Force Update
Factory Reset
Waiting for OTA B852, installing it OTA,
or
Local Update B852 (60MB)
Factory Reset
Flashing TWRP 2.8.7.0.img via ADB
Rooting with SU
Does this looks ok?

Something is going wrong.
Downgrade fails.
Both, Force Update and Local Update installation to B839 fails.
My device was rooted and the TWRP recovery was installed.
So I installed Stock Recovery EMUI3.1 in order to do the downgrade.
But there is no chance to get the downgrade to B839 work.
I also tried to downgrade to B830 but there is the same problem.
I tried several times.
What is wrong?

Related

roll back to 609 from b830

Hi, I updated my phone by manual way with dload folder from b609 to b621 to b623 to b630. Somehow something went wrong. b830 seems to be working but cant conet to te network. cant even change the motive on my phone. tried to roll back to 623 from 830 by simply using dload folder but it does not work. it seems that it downgrades but the soft is still b830. can i roll back to b609? the most important thing is that i can not even do the factory reset. it resets up to about 40 per cent and then the fail appears. when i turn on the phone it looks like it did work becase i have to set the language and the display settings but still cannot connetc with wi fi to the internet. i am hopeless. can i do it in such a way not to loose the guarantee. i think i still have it. i do not want to wait for the phone for a month before it is fixed.
No worries, you have to flash B800 (official Huawei downgrade firmware) first. After that you could go for B621 and after that B623.
1. flash B800 transition pack from here http://download-c.huawei.com/download/downloadCenter?downloadId=49144&version=114340&siteCode=de
2. flash B621 over B800 - download from here http://download-c.huawei.com/download/downloadCenter?downloadId=48964&version=113966&siteCode=it
3. Now u can flash B609 over B621 - download from here http://download-c.huawei.com/download/downloadCenter?downloadId=37141&version=64532&siteCode=it
thanx
gaugen said:
1. flash B800 transition pack from here http://download-c.huawei.com/download/downloadCenter?downloadId=49144&version=114340&siteCode=de
2. flash B621 over B800 - download from here http://download-c.huawei.com/download/downloadCenter?downloadId=48964&version=113966&siteCode=it
3. Now u can flash B609 over B621 - download from here http://download-c.huawei.com/download/downloadCenter?downloadId=37141&version=64532&siteCode=it
Click to expand...
Click to collapse
Great. Thank you for your answer. I just gave up because I was afraid I will lose the guarantee if I will try to do something myself. But if the problem appeers again or if they will want to charge me with the cost of fixing it. I will use your guide. Thank you
hey i need root on my p7-L10 b830
SpAwN772 said:
hey i need root on my p7-L10 b830
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Click to collapse
Fully Offtopic, but just flash the newest SuperSu.ZIP through TWRP 2.8.7.0.
l3Nni said:
Fully Offtopic, but just flash the newest SuperSu.ZIP through TWRP 2.8.7.0.
Click to expand...
Click to collapse
I need first bootloader unlock:crying:
Did you try to google for P7 + bootloader + unlock first? If yes say specifically what's the problem, if not do more research..
l3Nni said:
Did you try to google for P7 + bootloader + unlock first? If yes say specifically what's the problem, if not do more research..
Click to expand...
Click to collapse
Just find no bootloader unlock.IMG for the B830. for B621 yes. but not B830
You can request your bootloader unlock code here (http://emui.huawei.com/en/plugin.php?id=unlock&mod=detail). Through a fastboot command you can unlock the BL afterwards.
Hello guys,
I'm on b830 not rooted and stock recovery and cust 432 version im trying to get back to b817 as I found it more stable than b830 but no matter what I do.."no update package" message appear though I tried to change my cust but with no success
l3Nni said:
No worries, you have to flash B800 (official Huawei downgrade firmware) first. After that you could go for B621 and after that B623.
Click to expand...
Click to collapse
Hi im on b830 right now i want to flash to b800 but when i instal the flash, it says update failed at 19% i dnt know what to do csn somebody help pls...
hi dear guys,,,i'm om b830 .it is very bad and very wrong,,,so downgrade to b800 and emu3 but do not this rool back,when the end of install it had error fail
please help me what i do ,,,,my phone is p7_L10
Hey maybe samebody know that fb app is working or no?
hello, i have installed full firmware b830 from b621, and it said installation failed but the update was actually installed but the keyboard was missing, now factory reset fails(altough it wipes my phone) and i cannot for the love of god install any other firmware or roll back to b800 or anything and i am stuck with this b830, How do i install kit kat ?? please help
I read about a b630, where can i download it?
Hello did you find out the solution why it stops in 19% same thing is happening with me...
Mobile network gone
Hi,
I have updated my ascend p7 L10 to emui3.1 build 839(full rom)
Since then my mobile network is completely gone. I have restarted my device, chaned sim , tried to downgrade but none of options are working for me.
Can you pls help me to fix the problem? Thanks
Vinodpatel.05 said:
Hi,
I have updated my ascend p7 L10 to emui3.1 build 839(full rom)
Since then my mobile network is completely gone. I have restarted my device, chaned sim , tried to downgrade but none of options are working for me.
Can you pls help me to fix the problem? Thanks
Click to expand...
Click to collapse
Do you know what you cust version is before you updated? If not, what country are you in? This version is for cust c432.
gaugen said:
1. flash B800 transition pack from here http://download-c.huawei.com/download/downloadCenter?downloadId=49144&version=114340&siteCode=de
2. flash B621 over B800 - download from here http://download-c.huawei.com/download/downloadCenter?downloadId=48964&version=113966&siteCode=it
3. Now u can flash B609 over B621 - download from here http://download-c.huawei.com/download/downloadCenter?downloadId=37141&version=64532&siteCode=it
Click to expand...
Click to collapse
can i use transition pack (b800) to go from b8542 to b800??
this link doesn't work for me
can anyone send another link??

Update B832 --> B852 HELP

How can i update my actually rom B832 to B852 ?
You can go straight to B839, then OTA to B852, just backup your stuff.
tommykole96 said:
You can go straight to B839, then OTA to B852, just backup your stuff.
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Click to collapse
how to do to get back to B839 ? And what is OTA, i dont know what is it. I would be grateful for an explanation
On what rom are you now, b832? OTA ( Over The Air) is an update that comes wirelessly, it's not full firmware.
tommykole96 said:
On what rom are you now, b832? OTA ( Over The Air) is an update that comes wirelessly, it's not full firmware.
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Click to collapse
yes now b832 and he doesn't work well , video on Facebook crashed and youtube, and i think that camera doing bad photos (noise)
Update direct to B839, here's link: http://www.carbontesla.com/2015/11/download-ascend-p7-full-b839-lollipop-firmware/
Just make sure that you have P7-L10 variant.
And after upgrading to B839, flash This OTA: http://www.carbontesla.com/2015/12/download-huawei-ascend-p7-b852-lollipop-ota-zip/

How can i Install Lollipop From B126

Hey guys!, happy to see you guys around and i hope you can help me with my case.
I've a Huawei P7 L10 European Version(i believe) and i wanted to install Emui 3.0(Lollipop 5.1.1 Oficial), but i wanted to know if i needed any other version from my B126, because i downloaded Lollipop (B852) but it always pop FAILED after i do Local Update.
Is there a way to install Lollipop on my phone? do i've to have an specific version? also the phone says unlocked bootloader but i cant install any recovery.
Thanks!
You need to install B133SP01, then B609, and I believe it will be possible to do an upgrade to B85x based on Lollipop.
GawDroid said:
You need to install B133SP01, then B609, and I believe it will be possible to do an upgrade to B85x based on Lollipop.
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Should i install it via Local Update? B133SP01 then B609 then B5x? What about any FOTA update?
PD: Which version of B5X based on lollipop do you have or recommend?
I've checked this for you and this is the correct way to get Lollipop if you're on stock B126:
-Install full B133SP01 via local update
-Install full B609 via local update
-Install B623 (i've had an auto update from B609 at this point)
-Install B830 via the local update (it's Lollipop, incremental upgrade from B623) link: http://www.carbontesla.com/2015/10/download-ascend-p7-b830-android-5-1-1-lollipop-ota/
-Install B839 (major fixes) link: http://www.carbontesla.com/2015/11/download-ascend-p7-b839-lollipop-ota-zip-video-fix/
-and finally choose a B85x for yourself, I have't used one yet so can't recommend anything.
Edit: I did actually install B852 in the morning, works fine - good build
Incremental upgrade from B839 can be downloaded from here: http://www.carbontesla.com/2015/12/download-huawei-ascend-p7-b852-lollipop-ota-zip/

Where can I download EVA-L19C636B381? (Solved)

I did a rollback to EVA-L19C636B190 and after the rollback there was an update. I didn't download it yet and proceeded to allow the oem unlocking first and now it wont OTA update anymore. I'll do the manual update so if you have the files please share! if you have another method to make OTA work please tell me. Thanks in advance!
UPDATE: I somehow got the OTA when my dload failed. I found a update pack that for C636 and it failed to install but afterwards I could do the OTA coz it reset my whole system I think

Need Passed HW Update Verification After Debranding C432

Hi Guys
First Sorry For My Bad English
I debranded to l09-c432 and Install b136 Easy But When I want Install lastest Fw Like b394 or b386 i got error in 3button updating Method
I Need the Lastest FW for l09-c432 to i installable and pass Huawei Verification
For Sometime I want to install custom Frimware and go back emui i cant install lastest one whitout any error
reynard1 said:
Hi Guys
First Sorry For My Bad English
I debranded to l09-c432 and Install b136 Easy But When I want Install lastest Fw Like b394 or b386 i got error in 3button updating Method
I Need the Lastest FW for l09-c432 to i installable and pass Huawei Verification
For Sometime I want to install custom Frimware and go back emui i cant install lastest one whitout any error
Click to expand...
Click to collapse
Install b182 (still MM) and you should then receive OTA upgrades to b38x, b39x (Nougat)
zgfg said:
Install b182 (still MM) and you should then receive OTA upgrades to b38x, b39x (Nougat)
Click to expand...
Click to collapse
I Know That,But Ineed Full Flashable fw idont want OTA I need Flashable b38x frimware
Any help?
Sent from my EVA-L09 using Tapatalk
reynard1 said:
Any help?
Sent from my EVA-L09 using Tapatalk
Click to expand...
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I still don't understand why you don't 'like' OTAs. In System Update, Settings, you can always choose Full Update instead of default Differential. And you can force afterwards Factory Reset if you think you need.
b386 is the last flashable by DLOAD. Btw, I was going back and forth through diff stock and rooted and custom ROMs, rollbacks, OTAs, and never had any error in installations. There are many threads with excellent info and guides, you must read and follow because in diff situations methods might be different. DLOAD is not always applicable

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