Xperia Z1 has received the Android 5.0.2 official Lollipop treat from its manufacturer few weeks ago but as you know latest Android version is 5.1 so users want this one. Of course, Sony will take its time to release the 5.1 firmware but you can still get the goodies of 5.1 by using CM12.1 Custom ROM for Xperia Z1.
The instructions posted here are to help you update your Xperia Z1 to Android 5.1 Lollipop via CM12.1 Custom ROM. If you have rooted Z1, then don’t wait, download the ROM and rock.
- Make sure your Xperia Z1 is at least 91% or charged.
- Ensure that you have complete backup of all your important data.
- Make sure USB debugging is enabled on your smartphone. [If not, enable from Setting –> Developer Options]
How to Update Xperia Z1 to CM12.1 Android 5.1 Lollipop Custom ROM
Step 1: Download the custom ROM and GAPPS. For easy browsing, place both the downloaded zip files on desktop of your Computer.
Step 2: Connect your Xperia Z1 to your computer to transfer the download zip files to your phone SD card. [Make sure latest Sony drivers are installed, otherwise your PC won’t recognize your phone]
Step 3: Turn Off your phone and boot it to recovery mode. [You can’t use touch in recovery mode, so use Volume Up and Down buttons for navigation and Power button for selection]
Step 4: In recovery mode, first tap on “wipe data factory reset” option to perform a factory reset. Once this is completed, go to advanced options and select “wipe the cache” followed by “dalvik cache” options to clear the cache.
Step 5: Go back to main recovery menu and select “Install zip from sd card” followed by “choose zip from SD card” and select the ROM zip file you have transferred to SD card in Step 1. Once ROM flashing is completed, repeat the same step for GAPPS.
Step 6: Repeat the above step for Google Apps (GAPPS) installation.
Step 7: Once the installation is completed, go back to main recovery menu by selecting “+++++Go Back+++++” option and reboot your phone by choosing “reboot system now” option from main menu. For the first time, your phone might take little more time than it usually takes, so don’t be panic as it is normal and will be only for 1st time.
Now your Xperia Z1 should be on Android 5.1 Lollipop, courtesy of CyanogenMod Team.