Sony’s mid-range offering, the Xperia P, has received a minor maintenance update. The firmware holds the version number 6.1.1.B.1.54, and the Android version remains the same as before (4.0.4), so those of you who were hoping for Jellybean, it’s not your day. The update is for the Central European region and can be installed to your device with the Flashtool program. You also don’t need to have an unlocked bootloader to do that, so that’s a plus.
To get the firmware, follow the source link, which is right below.