Sony Xperia T is a decent phone. It powers a 1.5 GHz dual core processor with 1GB RAM, so installing CM 11 official ROM will not slow down it. However, please note that, currently CM11 (M9) is a nightly build, which means it will contain some bugs. Important: As always, create a backup of all important data in your Xperia T. Also, make a Nandroid back up of your device from recovery. Do not try this ROM on other Xperia devices! Requisites: – Sony Xperia T must be rooted and Custom Recovery like CWM or TWRP installed (find a solution at XDA forum). – CM 11 zip file (download from here) – Gapps zip file (download from here)

Installation Instruction

  1. Copy the downloaded CM 11 ROM zip file and Gapps zip file to the phone memory.
  2. Switch off your phone and boot it into Recovery mode. From recovery, wipe cache partition and the dalvik cache.
  3. Now go to “Install zip” and then “Select zip”. Choose the CM 11 ROM zip file. Do the same for Gapps zip file.
  4. Once again, wipe cache partition and dalvik cache. Then select “wipe data/factory reset” option and perform full system wipe.
  5. Now, return to the main menu and select reboot system now. The device will now boot into CyanogenMod. Enjoy! Note: The first boot will take a few minutes. Do not press any button until your phone boots up.