[Desire 820 Q&A, Help & Troubleshooting] jerico9:
Hi Peeps,

I have read alot of threads which seem to be close to my issue but they seem to be able to get in to recovery via HBOOT, or the same issues have been posted but

no answers or follow ups

, if they have fixed the issues. Most annoying thing that, fixing the issue but not posting how. There does seem to be a lot asking the same question but no answer. I had asked in other threads, i have removed them and wrote this more complete thread. So any help would be appreciated, not only me but anyone else with this issue::angel::fingers-crossed:

Ok, The phone is a friends who got this phone with it already in a bootloop. According to the seller, When they did the official update (not sure if from KK-LP or LP-MM, but the) seller said it was on 5.0.2 Lollipop.

As usual from HTC, they have 10s of different OS versions of the same device, not helped by the fact they have dual and single sim models, plus, Snapdragon and MediaTec models.

This is the dual Sim 820N Snapdragon 615 model.

I don't know if its been rooted or has USB Debugging on. I have relocked the bootloader via fastboot. I can get CID and getvar all from fastboot but when I try and flash recovery I get signature verify fail. Also, I have downloaded All In One Flash Tool but it wont connect to the device.

Here is the NBOOT Screen info

*** Software Status: Official***

*** Relocked ***

A51_UL PVT SHIP S-ON

HBOOT-3.19.0.0000

RADIO-0.1.01.010-U10305041_08.01.50512

OS-2.10.401.4

eMC-boot 2048MB OC

Nov 13 2015,16:02:23

This is the report from Fastboot getvar all command

(bootloader) version: 0.5

(bootloader) version-bootloader: 3.19.0.0000

(bootloader) version-baseband: 01.01.010_U10305041_08.01.50512

(bootloader) version-cpld: None

(bootloader) version-microp: None

(bootloader) version-main: 2.10.401.4

(bootloader) version-misc: PVT SHIP S-ON

(bootloader) serialno: CC53LYC03732

(bootloader) imei: 357586061067150

(bootloader) imei2: Not Support

(bootloader) meid: 00000000000000

(bootloader) product: a51_ul

(bootloader) platform: hTCBmsm8939

(bootloader) modelid: 0PFJ40000

(bootloader) cidnum: HTC__001

(bootloader) battery-status: good

(bootloader) battery-voltage: 0mV

(bootloader) partition-layout: Generic

(bootloader) security: on

(bootloader) build-mode: SHIP

(bootloader) boot-mode: FASTBOOT

(bootloader) commitno-bootloader: da038a09

(bootloader) hbootpreupdate: 11

(bootloader) gencheckpt: 0

(bootloader) mfg-name: 1001

all: Done!

Any help would be great, I have been trying this issue everyday for over a week. I'm not a total NOOB but, I am a beginner still

Thanks in advance - Also ***I WILL POST BACK WITH THE FIX, IF AND WHEN I FIX IT***

Or can anybody tell me where I can download the RUU and the flash tool if that would work. I have looked at loads of sites trying to find the right RUU then see if I can somehow update it with that. I am trying everything I can, Someone must know something, anything. Its not like its a crap phone with hardly any development. Its a good mid-range device with loads of support - I just can't find the right answer to my issue. I don't want to give up, The answer is out there. Even have looked under other devices, Thats how I've come across the RUU option