Sony Xperia U ST25i Gets Android 5.0.2 Lollipop Update with CM12

Xperia U ST25i users who were eagerly waiting for the Android Lollipop update for their smartphones should now jump in joy as the update has been released. Though not an official one but CyanogenMod Android 5.0.2 Lollipop ROM is much better when compared with Stock Firmware.

So ready to install CM12 Android 5.0.2 Lollipop on your Xperia U ST25i smartphone? Alright, lets proceed with steps to do this safely and easily.

This ROM is only for Xperia U ST25i and practicing it on any other device can be fatal for that device. [Verify your phone model from Settings –> About Phone]

Safety Guidelines

  • Make sure your Xperia U ST25i is at least 66% 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]

Files Required

  • Download CM12 ROM Android 5.0.2 Lollipop Custom ROM
  • Download GAPPS

The CM12 ROM Android 5.0.2 Lollipop Custom ROM mentioned in this post belong to its respective developer. We are just covering tutorial to help you in its installation which is well-written and very easy to understand. However if you damage or brick your phone, AndroidsDNA.com cannot be held responsible.

How to Update Xperia Sola MT27i to Android 5.0.2 Lollipop via CM12 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 U ST25i to your computer to transfer the download zip files to your phone’s SD card. [Make sure the 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 the 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 the “reboot system now” option from the main menu. For the first time, your Xperia U ST25i 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.

That’s it. You have successfully updated Xperia U ST25i to Android 5.0.2 Lollipop using CM12 Custom ROM. Feel free to ask any questions through the comment section.

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