Update Mediapad M3 to btv-w09c128b351

[ludovicien]

B303 in the UK on my wifi M3. Nothing in firmware finder but I checked system update and it was there.

 

[purpse]

Were you coming from B302? Im on B302 in the UK but have no updates to B303 yet. Have you noticed any improvements apart from security updates?

 

[jkissane]

Were you coming from B302? Im on B302 in the UK but have no updates to B303 yet. Have you noticed any improvements apart from security updates?

Just appeared on my tablet as well, was on B302 beforehand.

 

[MarkMRL]

Anyone got it for the LTE version yet? This seems like an interesting update that will fix some of the (few) issues I still have with it.

By the way, I was wondering, does this update fix the following bugs:
1. low resolution power saving mode not doing anything (check for the options under the power saving menu, on B303 on my tablet, enabling low resolution mode did absolutely nothing, I really miss this feature from Marshmallow because it increased the battery life A LOT, especially when watching movies)
2. Can't use fingerprint scanner gesture and on-screen softkeys at the same time
3. Sometimes the keypad for typing in the unlock pin code would not appear for me, this got annoying especially when for some reason I could not unlock using the fingerprint, I had no way to type in the code

 

[elcidroyale]

Wifi US version updated from 350 to 351 with Firmware Finder. BUT I used their VPN and updated through Huawei system settings.

Sent from my BTV-W09 using Tapatalk

 

[MarkMRL]

I got the equivalent update for the European lte version, it's called b307. I forced it through firmware finder, everything seems to be alright, except for the fact low resolution power saving mode is still not working at all.

 

[sevenoverthree]

Apologies if this post is a little meandering- I have some questions and comments both and I am kind of fried

So I had updated my US Mediapad M3 to B351, but found somewhere along the way my OEM Lock had turned back on and was inaccessible. The only Firmware I was able to find to get me to something resembling stock was the C100B006. I was able to install B350 on top which resulted in 5ghz, EMUI 5 and Nougat with what appears to be an unlocked bootloader. My issue now is not I am not sure which TWRP version I should be using. This setup does not have the usual updater and build number is NRD90m test-keys, as opposed to C128B350. I found this site which seems to list all of the firmware builds as the firmware finder, but allows you to download them directly to a pc, which is handy if you want to force a firmware install.

Unfortunately the site simply names everything "global" which doesn't help. So my question is does anyone have a good sense of the naming convention for this firmware? Seems C100BXX is Europe and C128BXX is US? What region is C233BXX?

If this is the case, what I essentially did was put a US Nougat update over an European Marshmallow Build. The results are mostly good except that I can't seem to install TWRP and therefore I can't root right now. My inclination is to go back to an early C128 build with EMUI 4.1 and a locked up bootloader and try to get back to C128B351 via firmware finder. I have my unlock key on file- does changing my regional firmware affect the ability to use my unlock key?

Any suggestions as to what I should do? The goal is EMUI 5/Nougat/TWRP/Root/5ghz.

 

[sevenoverthree]

UPDATE: Welp... I appear to be bricked beyond any help. I have modded and rooted a dozen android phones and tablets over the years and this has easily been the worst experience for me.

I can only speculate to the cause but, I was no longer able to flash anything successfully. Although the bootloader confirmed that it was fully unlocked, all methods of flashing (hard flash via sdcard and adb minimal) were not completing. I decided to try to manually flash an unpacked update.app from the last image that I knew was working. As I had the bootloader and confirmed I was connected and adb running, I thought I would try re-applying the unlock code. Now I have the "Your device can't be trusted" message and am unable to get into the bootloader. Before this, I was able to hold Volume - and plug the usb cable and it would vibrate once and go to bootloader. Now it vibrates twice and I only get the mediapad splashscreen to the unlock message. No combination of button presses seems to work, and my pc no longer registers the usb cable.

Any thoughts?

 

[elcidroyale]

UPDATE: Welp... I appear to be bricked beyond any help. I have modded and rooted a dozen android phones and tablets over the years and this has easily been the worst experience for me.

I can only speculate to the cause but, I was no longer able to flash anything successfully. Although the bootloader confirmed that it was fully unlocked, all methods of flashing (hard flash via sdcard and adb minimal) were not completing. I decided to try to manually flash an unpacked update.app from the last image that I knew was working. As I had the bootloader and confirmed I was connected and adb running, I thought I would try re-applying the unlock code. Now I have the "Your device can't be trusted" message and am unable to get into the bootloader. Before this, I was able to hold Volume - and plug the usb cable and it would vibrate once and go to bootloader. Now it vibrates twice and I only get the mediapad splashscreen to the unlock message. No combination of button presses seems to work, and my pc no longer registers the usb cable.

Any thoughts?

Yeah you went too far man! Wish I could help.

Sent from my BTV-W09 using Tapatalk

 

[sevenoverthree]

Yeah you went too far man! Wish I could help.

Sent from my BTV-W09 using Tapatalk

I appreciate that I think I need to find an outfit that can jtag me.

 

[elcidroyale]

Just buy a new one and switch it out. Or yeah problem solve it.

I LOVE this tablet. By far my fav. Took a LOT of work just to turn on 5ghz but now that it's done, it was worth it.

Hope you figure it out so you can have fun with it sooner than later.

 

[ajnexus5]

UPDATE: Welp... I appear to be bricked beyond any help. I have modded and rooted a dozen android phones and tablets over the years and this has easily been the worst experience for me.

I can only speculate to the cause but, I was no longer able to flash anything successfully. Although the bootloader confirmed that it was fully unlocked, all methods of flashing (hard flash via sdcard and adb minimal) were not completing. I decided to try to manually flash an unpacked update.app from the last image that I knew was working. As I had the bootloader and confirmed I was connected and adb running, I thought I would try re-applying the unlock code. Now I have the "Your device can't be trusted" message and am unable to get into the bootloader. Before this, I was able to hold Volume - and plug the usb cable and it would vibrate once and go to bootloader. Now it vibrates twice and I only get the mediapad splashscreen to the unlock message. No combination of button presses seems to work, and my pc no longer registers the usb cable.

Any thoughts?

Try this and go back to 4.1 and from there up again:
https://forum.xda-developers.com/showpost.php?p=74973897&postcount=11

 

[musiqlives]

Just buy a new one and switch it out. Or yeah problem solve it.

I LOVE this tablet. By far my fav. Took a LOT of work just to turn on 5ghz but now that it's done, it was worth it.

Hope you figure it out so you can have fun with it sooner than later.

Man... is there anyway you can assist me in getting this thing where it needs to be. I can not get the Bootloader code. I have halfheartedly tried. All I care about is the 5Ghz network. If I have to root to get it done, that fine. Been doing it since the Note 3! Man those were the days. Is there any way you can give me the steps to go through with dc-unlock. PM me if you have time or even care to go through it. Thanks in advance.

 

[elcidroyale]

Hey man I can't help you really because I google a bunch of stuff and used a combination of different links. There was a lot of trial and error. Some steps worked from one guide and then I used another guide for other steps. Then I remember I had trouble with root and kept trying the same thing over and over then I did something which I forgot & it worked.

I also did it through WIndows Parallel on a Mac to complicate things.

I'm no master flasher by any means. I've just rooted, installed ROMS, even change the IMEI on my phone (that was VERY HARD and took a LONG time) so I could activate it on Virgin Mobile (the thread was found here but eventually got deleted).

You'll just have to do what I did. Google & try different stuff until it works.

For the DC Unlock I just followed their tutorial I think.

1) https://www.dc-unlocker.com/how-to-read-huawei-bootloader-unlock-code
2) http://www.stechguide.com/unlock-bootloader-of-huawei-devices/
3) for root, I don't remember the link but I think there are a number of ways.
4) enable 5GHZ
5) update firmware via Firmware FInder (I used VPN method to update in system settings).

If it doesn't work, I couldn't help you then. I just tried **** until something worked.

 

[musiqlives]

OK... Happy New Year good people!
I finally got my update to work through Firmware Finder (App in Play Store). Their instructions are all correct. If you follow them exactly, your results will at least let you download the firmware package. There are little things they don't & can't help you with. My issue was I had my router going through an anonymous DNS that doesn't reveal my results to my ISP. On top of that I had ad blockers setup on the tablet. They were interfering with the VPN that was setup in FF to allow the download & installation to work. Make sure your DNS are set to Google (8.8.8.8, 8.8.4.4) Make sure there are no ad blockers on the tablet or setup in your network. They don't mention this in the instructions, but when you go in to modify your wifi connection, I had to changed from DHCP to Static. Only then did it work properly. Hope this helps you getter done! Good luck & God Speed!

 

[sevenoverthree]

Hey man I can't help you really because I google a bunch of stuff and used a combination of different links. There was a lot of trial and error. Some steps worked from one guide and then I used another guide for other steps. Then I remember I had trouble with root and kept trying the same thing over and over then I did something which I forgot & it worked.

Yeah as a guy who bricked his unit going for the 5ghz, my big takeaway is that getting root after EMUI5/Nougat is super dicey. The problem is that there are LOTS of firmware revisions out there (many of which do not work together) and not a lot of established documentation about which revisions work for which units. This is different from the typical ROM flashing scenario, because the recovery partitions (these have two) are incorporated into the firmware. It's tempting to find other compatible FW's and start flashing away, but it's not like trying Lineage rom vs resurrection mod- once you drop in the wrong FW, you are one or two steps from a dead end. BE CAREFUL!

I will definitely try again, but go for root right from EMUI4.1. There are only a couple of TWRP builds that are obvious choices. The TM Firmware app is great and Upgrading to EMUI5 is SUPER easy- frankly it's dangerous because it's so easy. Good luck everyone :good: