How to unlock Huawei bootloader

[ruggb]

I have a Huawei Mate 9 with EMUI 8 on AT&T. I need to get it to EMUI 9 for VoLTE operation. It won't do that automatically in the US.
I first need to unlock the bootloader and I do have the password.
I have spent days trying to do this making baby steps and I am totally frustrated and currently here :

Phone is in Developer mode with OEM Unlocking, Allow ADB debugging in charge only mode and USB debugging enabled.
I open Powershell in ADB & Fastboot Portable folder and enter:
./ADB reboot bootloader
Phone boots into bootloader showing:
Android reboot reason:
bootloader 1
NA
reboot_enter_fastboot_common_func
PHONE Locked
FRP Unlock

If I enter:
./fastboot flashing unlock
I get:
FAILED (remote: 'check password failed!')
fastboot: error: Command failed

I do not have any locks or passwords on my phone.

Where do I go from here???????

Follow on question will be:
Where do I get a version of EMUI 9, or an Android Pie version for this phone?

Thank you for bringing back my sanity.

 

[ruggb]

I managed to get it to android 9. My provider still says it cannot do VoLTE. Is that true? If not, how do I enable VoLTE.

I still would like to know how to unlock bootloader.

 

[i928]

It depends on what band you can use in your area. I can use Band 2 VoLTE in SF bay area. I call H2O(ATT) to enable LTE/4G on Mate 9. I have to reset network setting to get VoLTE. You can use"Network Cell Info Lite" or "NetMonitor" to check whether you on 4G/LTE

 

[James_Watson]

I have a Huawei Mate 8 with EMUI 8. But it does support VoLTE.

 

[ruggb]

It depends on what band you can use in your area. I can use Band 2 VoLTE in SF bay area. I call H2O(ATT) to enable LTE/4G on Mate 9. I have to reset network setting to get VoLTE. You can use"Network Cell Info Lite" or "NetMonitor" to check whether you on 4G/LTE

network cell info lite says my phone is not VoLTE capable. It is now on Android 9 and I don't find any indication of a switch to turn it on so I guess the Mate 9 is not VoLTE. But you say it is working on your Mate 9. When I talked to H2O, they had no clue and basically said my Mate 9 was not capable. That was with EMUI 8. So, Android 9 did not change anything.

 

[xXx yYy]

Depending on the operator, a phone must sometimes be operator-branded and/or use operator-customised system software to be able to use VoLTE. Your subscription (incl. SIM card) must support VoLTE for the device model you're using. To inquire if your device, software, subscription and SIM card support VoLTE, contact your mobile network operator.

A phone's VoLTE capability basically doesn't depend on Android OS.

 

[ruggb]

I get one support person saying it is compatible and another sayng it isn't, then another saying it is...........

 

[i928]

network cell info lite says my phone is not VoLTE capable. It is now on Android 9 and I don't find any indication of a switch to turn it on so I guess the Mate 9 is not VoLTE. But you say it is working on your Mate 9. When I talked to H2O, they had no clue and basically said my Mate 9 was not capable. That was with EMUI 8. So, Android 9 did not change anything.

Does Network cell info show Mate 9 on LTE H2O? if it still show LTE H2O when you make a call, that mean ATT did made a change on their side.

 

[ruggb]

under GAUGE, NCI Lite shows HSPA H2O
Under STATS it shows 100% 3G
Under HISTORY it shows 3G
If I set the Preferred network mode to LTE/WCDMA/GSM auto, I don't receive calls but I can make them.
If it is set to WCDMA/GSM auto everything works both incoming and outgoing calls, text, & data.
So it appears it is only doing 3G. Why am I getting mixed messages from H2O?
I had a LTE/4G switch under EMUI 8 but it is not there under Android 9.1.
However, when I turned it on I got the same response as selecting LTE/WCDMA/GSM auto.
So, why does yours work and mine does not??????????

 

[i928]

I get one support person saying it is compatible and another sayng it isn't, then another saying it is...........

Here what happened to me when I call.
operator: there is no LTE support for Mate 9
I: Someone use ATT and has Mate 9 support LTE.
Operator: ok, let me work on it. It set, reboot your phone, it should work. Reset network settings if it does not work.

what I did
1. reboot, H2O still uses 3G when I made calls
2. Reset network settings, and reboot. H2O on 4G LTE when I make calls.

 

[ruggb]

When I had set it to LTE (in 8 or 9), I could make calls but I could not receive calls.
So, you can make AND receive calls?

My network settings are:
H2O INTERNET
PRODATA
MMSC = http://mmsc.mobile.att.net
MMS proxy = proxy.mobile.att.net
APN type = defult,mms,supl
APN protocol = IPv4

Does that match yours?

 

[i928]

Almost, I have MMS port 80
Try
1. Call H2O to provision VoLTE
2. Reset NETWORK SETTINGS. This step clear APN setting too, enter APN setting after reset, reboot

 

[ruggb]

Yes, my MMS is also port 80. So, by your experience, H2O has not provisioned VoLTE for my phone. I will try calling them one more time.
What is your Preferred network mode, LTE/WCDMA/GSM auto, or WCDMA/GSM auto?
Thanks

 

[i928]

LTE/WCDMA/GSM auto
you need to perform step 2 after provider setup on their side.

 

[ruggb]

I will give them a call in the AM. Thanks
If I set mine to that, I do not rcv any calls.
Everything else works.

 

[ruggb]

I will call them in the AM, thanks
If I set mine to that, I don't rcv any calls. Everything else works.

 

[alecxs]

Dozens of Huawei and Honor devices with Kirin processors can now be bootloader unlocked

Using this open-source tool, you can now unlock the bootloader of several HiSilicon Kirin-powered Huawei and Honor devices. Check it out!

www.xda-developers.com

 

[01mrhacker01]

I have a Huawei Mate 9 with EMUI 8 on AT&T. I need to get it to EMUI 9 for VoLTE operation. It won't do that automatically in the US.
I first need to unlock the bootloader and I do have the password.
I have spent days trying to do this making baby steps and I am totally frustrated and currently here :

Phone is in Developer mode with OEM Unlocking, Allow ADB debugging in charge only mode and USB debugging enabled.
I open Powershell in ADB & Fastboot Portable folder and enter:
./ADB reboot bootloader
Phone boots into bootloader showing:
Android reboot reason:
bootloader 1
NA
reboot_enter_fastboot_common_func
PHONE Locked
FRP Unlock

If I enter:
./fastboot flashing unlock
I get:
FAILED (remote: 'check password failed!')
fastboot: error: Command failed

I do not have any locks or passwords on my phone.

Where do I go from here???????

Follow on question will be:
Where do I get a version of EMUI 9, or an Android Pie version for this phone?

Thank you for bringing back my sanity.

GitHub - mashed-potatoes/PotatoNV: Unlock bootloader of Huawei devices on Kirin 960/95х/65x/620

Unlock bootloader of Huawei devices on Kirin 960/95х/65x/620 - GitHub - mashed-potatoes/PotatoNV: Unlock bootloader of Huawei devices on Kirin 960/95х/65x/620

github.com