Unable to upgrade my HTC 826 to Android M via OTA updates

prateek23

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Dec 20, 2016
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Hi All,

I have recently received OTA Marshmellow update for my HTC Desire 826 Dual SIM. I have not rooted my phone. But while installing the update, recovery screen appears with below error msgs. I tried after factory reset but didn't work. Can anyone help me to understand what this means ? and how it can be solved ?

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)
E:Find no match PARTITION: for package path @/cache/recover/block.map
Finding update package...
Opening update package...
Verifying update package...
Installing update...
L50QCT. 01 . 103 . 015
Verifying current system...
system partition has unexpected contents
E:Error in @/cache/recovery/block.map
(Status 7)

Installation aborted.
 

prateek23

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Dec 20, 2016
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That topic relates to sideloading update, I'm not sideloading them (manually installing them), and the solution stated there is to flash stock rom which I'm unable to find. Is there any other way of fixing this?
 

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