Monday, March 28, 2016

Nexus 9 Marshmallow update from Android LMY48M

Recently I wanted to update my Nexus Android OS version 5.1.1 LMY48M to Android N. I downloaded a system image from Google website and could not update since I got unlock denying error when using "fastboot oem unlock" or "fastboot flashing unlock". So I followed the instructions provided by  dsclee1 to update LMY48M to  Android N.

1. Reboot into HBOOT with "adb reboot bootloader"
2. Press Volume Down to highlight Recovery, then press the Power Button to enter it.
3. Wait until the Google logo goes away, and you should see a picture of an Android laying on it’s back. Hold down the Power Button + Volume Up (very important to hold Power FIRST)
4. Download Nexus 9 (Wi-Fi) LMY48T from LMY48M
5. If you don’t have it already, download and install “Minimal ADB and Fastboot”: when it’s installed let it run straight away, and leave the command prompt open you’ll need it in a min
6. Copy the OTA update file you downloaded to the folder that Minimal ADB was installed in (usually C:\Program Files (x86)\Minimal ADB and Fastboot\)
7. Back on your device use Volume down to get to “Wipe Cache Partition”, and press the Power Button to activate it. If you want to be really sure this will work you should do a “Wipe data/factory reset” too, but be aware you will definitely lose your data.
8. Use Volume up to go to “Apply update from ADB”, and press the Power Button to enter it
9. On your PC, in the Minimal ADB Command Prompt (that you should still have open from earlier) enter “adb sideload {NAMEOFOTAFILE}”
10. Reboot
11. Go to the Settings->About->Software Update, and the device will update it self to Android N 6.0.1.

Or in the 4 step, directly update it from MRA58K from LMY48M if we can find the OTA firmware but I did not find it.


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