[HTC U11  Guides, News, & Discussion] 5m4r7ph0n36uru:
How-To Guides

[IMG="Guideline"]https://c1.staticflickr.com/1/765/32567527592_36bafaa846.jpg[/IMG]​

1. How-To flash a RUU using the SD card method

reboot to download mode

perform

htc_fastboot getvar all

and note down your original software version

download the latest Stock RUU for your device.

flash your RUU to revert to stock

rename RUU to 2PZCIMG.zip

copy 2PZCIMG.zip to root directory of SD card

reboot to download mode

press Volume Up button to confirm flash of RUU

As soon as your RUU has been flashed sucessfully, that's it. Your are now Full Stock again, or updated to lates software version respectively!

2. How-To restore an untouched/pristine system by using a Nandroid Backup

flash TWRP custom recovery

download custom recovery at https://twrp.me

reboot to download mode

adb reboot download

flash recovery image

htc_fastboot flash recovery nameoftwrp.zip

Restore your Nandroid. If you got none yourself, it might be possible that you’ll find one in the above linked Google spreedsheet.

unzip the according Nandroid

copy Nandroid to TWRP/Backup/SerialNo/Nameofbackup on your extSD

restore Nandroid by using TWRP > RESTORE and choosing above copied Nandroid

Flash incremental OTA firmware

reboot to download mode

perform

htc_fastboot getvar all

and note down your original software version

download all incremental OTA firmwares to your PC, starting with the one above your current firmware version, up to the software version number of your above choosen Nandroid Backup (ATTENTION: If you are S-OFF it will suffice to download the latest Incremental OTA as well as the latest Combined Full Wipe firmware according to the above choosen Nandroid Backup)

flash all incremental OTA firmwares – one after another – following the below named steps (ATTENTION: If you are S-OFF you start with the Combined FullWipe, and proceed with the Incremental OTA one, to ensure that you’ll be able to receive upcoming OTA updates)

htc_fastboot flash zip nameoffirmeware.zip

(ATTENTION: this has to be done twice to comlete, and it will flash full firmware, thus TWRP will be replaced by stock recovery)

As soon as you restored the Nandroid and flashed all incremental firmware file up to the current build number of your Nandroid, that's it. Your are now Full Stock again!

3. How-To manually flash an OTA Update

3.1 Pre-ota preparations:

Download needed OTA package, in my example we will use

OTA_OCEAN_UHL_N71_SENSE90GP_HTC_Europe_1.13.401.1-1.03.401.6_release_5054200ovndmjh5kcwjecc.zip

Check your ROM version in Settings > About > Software Information, it MUST match the second value. In this example case

1.13.401.1-1.03.401.6

, if you have version different from

1.03.401.6

, update will FAIL.

Make sure that your device running system without any app/files modifications, otherwise update will FAIL.

Check your recovery, official OTA should be applied only on Stock Recovery.

Now copy your OTA package to system storage, I recommend to copy file in root of the Internal Storage.

When preparation stage is done, we can proceed to installation.

3.2 OTA installation:

Turn off device.

Press Power button and Volume down button, keep them until you see download mode.

Use the Volume rocker to navigate to the menu entry Reboot to bootloader and press Power button to confirm this action.

Use the Volume rocker to navigate to the menu entry Reboot to Recovery and press Power button to confirm this action. Your device will now reboot to recovery mode.

When recovery starts, you will see a red triangle with an exclamation mark within. Don’t worry nothing bad happened, this is just the entry screen of your stock recovery.

Wait for a short while and press Volume-Up button with Power button. This combination allows you to enter the Recovery menu.

Use the Volume rocker to navigate to apply from phone storage option and press Power button to confirm.

Now you can choose your OTA package. In our example it will be stored in

data/media/0/OTA_OCEAN_UHL_N71_SENSE90GP_HTC_Europe_1.13.401.1-1.03.401.6_release_5054200ovndmjh5kcwjecc.zip

then press Power button.

After reboot you will get message that you successfully updated your device.

4. How-To to take an OTA using TWRP Recovery

The whole thanks and respect for this work belongs to [MENTION=1162986]Captain_Throwback[/MENTION]. Thanks to you mate!

5. How-To Downgrade your device while S-ON

The whole thanks and respect for this work belongs to [MENTION=7521917]ziand_[/MENTION]. Thanks to you mate! But never do it if you do not have a clear vision how to do it. For inexperienced users it is a way to get a brick, I will not accept any liability!