Androidbiits.com brings an exciting news for Sony Xperia Z2 Tablet SGP521 users. CyanogenMod 12.1 Nightly [castor] Custom ROM is released for Sony Xperia Z2 Tablet SGP521. Previously, Androidbiits.com has published the simple tutorial for updating Sony Xperia Z1 Compact D5503 to Lollipop 5.1 using CM12.1 [amami]. The exciting news is that SGP521 owners can now install CM12.1 [castor]. I am going to publish an easy tutorial for updating Sony Xperia Z2 Tablet SGP521 to Android 5.1 Lollipop using CM12.1 [castor]. No doubt, this is an exciting news for the proud owners of Z2 Tablet SGP521 who are not happy with KitKat and planning to test Lollipop 5.1 on SGP521.

I am expecting that Z2 Tablet SGP521 users will be able to install CM12.1 [castor] on SGP521 rapidly without having issue after reading the easy tutorial written in Androidbiits.com. CM12.1 [castor] requires rooted SGP521, so it is crucial to root Sony Xperia Z2 Tablet SGP521 before installing CM12.1 Nightly [castor]. If you have already rooted SGP521, then you don’t need to worry. You must install CWM recovery on SGP521 before installing CM12.1 [castor]. I forgot to say that Z2 Tablet SGP521 users can install CM12.1 [castor] safely after unlocking the bootloader.

Androidbiits.com recommends that Z2 Tablet SGP521 owners must save their documents including contacts and messages in a secure place before installing CM12.1 Nightly [castor], otherwise all your documents including contacts and messages will be deleted from your SGP521. If you are not happy with previous firmware, then you must install CM12.1 [castor] on SGP521. CM12.1 [castor] will let Z2 Tablet SGP521 users test Lollipop 5.1 on SGP521. CM12.1 [castor] may also bring many improvements on SGP521. I forgot to say that SGP521 users may experience some bugs after installing CM12.1 [castor] on their device.

Below are the easy instructions for installing CM12.1 Nightly [castor]. Androidbiits.com will not take responsibility if SGP521 got broken during the installation of CM12.1 Nightly [castor]. SGP521 battery must be above 94 percentage before following this tutorial.

How to Install Android 5.1 Lollipop CM12.1 [castor] on Sony Xperia Z2 Tablet SGP521 [Simple Steps]

1. It is the time to download CyanogenMod 12.1 [castor] for phone.

2. Gapps must be downloaded for phone.

3. It is the proper time to activate USB debugging.

4. It is the time to attach SGP521 with desktop.

5. It is the time to send CyanogenMod 12.1 Nightly [castor] to phone.

6. It is the time to power off SGP521.

7. It is the time to remove the USB cable from SGP521.

8. It is the time to put SGP521 into Recovery Mode.

9. It is the time to click “wipe data/factory reset” on phone.

10. It is the time to click “wipe cache partition” on phone.

11. It is the time to click “install zip from SD card” on phone.

12. It is the time to choose CyanogenMod 12.1 [castor] on phone.

13. It is the time to install CyanogenMod 12.1 [castor] on phone.

14. It is the time to go to the main menu on SGP521.

15. It is the time to click “reboot system now” on phone.

16. It is the time to wait until phone reboots.

After your Z2 Tablet SGP521 is restarted, you can enjoy CM12.1 [castor]. If you are having issue during the installation of CM12.1 [castor] on SGP521, then feel free to share your issue with Androidbiits.com.