Official OTA Update Links and OTA updating modified systems

Quote:

Don't forget to thank me and Radii it means a lot to us! :D

Upon discovering the reason people being given an error trying to flash OTAs in my TWRP recovery image I decided I would come up with a work around while I work out a way to fix it.

The following solution is group work between me and Radii.

If you came here just for OTA links then click HERE

Click below spoiler if you haven't installed TWRP on your device and you want to OTA update and then install TWRP.

First you need to download the version you would like, in theory you could backdate although this hasn't been tested and it may misbehave. For example the latest version as of 16/10/2015, build number cm-12.1-YOG4PAS38J.

On the spread sheet you will need two files, the fastboot and the signed. In the fastboot ZIP there is a file called recovery.img. Copy this to your android SDK platform tools folder. Now with the signed ZIP you either copy that to the same folder (platform-tools). Put your phone into fastboot mode and type.

Code:

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fastboot -i 0x2b4c boot recovery.img

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Or the name of the recovery if you renamed it.

Your phone will boot into Cyanogen OS Recovery. From there click Apply Update (Top option) and click ADB Sideload. Then type,

Code:

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adb sideload cm-12.1-YOG4PAS38J-ham-signed.zip

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Or whatever you renamed it to.

Reboot and you're done! Now you'll need to install TWRP to flash things like SuperSU and Xposed.

To install TWRP you need to download the latest TWRP image from HERE move that to platform-tools and type (with your phone in fastboot mode/bootloader mode of course)

Code:

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fastboot -i 0x2b4c flash recovery "recovery.img"

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Changing the name in the quotations to the name of the recovery and removing the quotes.

Click below spoiler if you have installed TWRP on your device and you want to OTA update and restore/preserve TWRP

Do the same as above, I have discovered it's impossible to preserve because Cyanogen will auto-write it's own recovery to the recovery parition.

Nerdy stuff

If you're wondering why you can't OTA without going through all this then it's because Cyanogen OS will do checks to see if the System has been r/w mounted. If so then it will stop all OTAs from installing. Simple when you think about it.

FAQ

• Q: Why isn't TWRP still installed after installing the OTA? A: Because Cyanogen OS will write over the recovery partition with Cyanogen Recovery


• Q: Will I lose all my data? A: Don't wipe and no, you can dirty flash to preserve data.