Help Android 6.12.841.4 update fails

[Phillip Gardner]

Hi Guys,

I have an HTC m8 phone from Telstra. Never been modified and running stock android 5.0.1.
Have tried numerous times to update to 6.12.841.4 but each time the update fails with one of two messages.
First error:
E:missing bitmap oem_unlock_bg
(Code -1)
E:missing bitmap oem_unlock_bg_yes
(Code -1)
E:missing bitmap oem_unlock_bg_no
(Code -1)
Finding update package...
Opening update package...
Verifying update package...
E:failed to verify whole-file signature
E:signature verification failed
Installation aborted.

After reboot, download update package again, receive error 2
E:missing bitmap oem_unlock_bg
(Code -1)
E:missing bitmap oem_unlock_bg_yes
(Code -1)
E:missing bitmap oem_unlock_bg_no
(Code -1)
Finding update package...
Opening update package...
Verifying update package...
Installing update...
M60QCT.01.002.018
mount: failed to mount /dev/block/platform/msm_sdcc.1/by~na
e/userdata at /data: Device or resource busy
Verifying current system...
E:unknown command [set_err_msg]
"/system/vendor/lib/libwvm.so" has unexpected contents.
E:Error in /data/data/com.android.providers.downloads/app_f
ta/OTA_M8_UL_M60_SENSE70_MR_Telstra_WWE_6.12.841.4-4.19.841
9_release_464352.zip
(Status 7)

Installation aborted.

HBOOT menu shows the following
*** Software status Official ***
*** Locked ***
M8_UL PVT SHIP S-ON
HBOOT-3.19.0.0000
RADIO-1.26.214500021.24G
OpenDSP-v48.2.2-00564-M8974_FO.1211
OS-4.19.841.9
eMMC-boot 2048MB
Oct 1 2015,23:29:11.0


I have factory reset both the phone and it's cache partition on a number of occasions, but most times I get error number 1.
This phone is running the complete stock firmware as supplied by Tesltra and has not been modified in anyway.

I have tried to download the update numerous times both at home and work as this gives me the added advantage of trying via another ISP. But still no luck.

Any suggestions as to where I might look to solve this issue ?

Thanks