Updating sony ericsson firmware official
Hold your horses - the XPERIA X10 migration to Eclair 2.1 hasn't begun yet.
However Sony Ericsson released a major firmware update for their Android flagship improving its performance and stability.
If you already have an unlocked bootloader and/or installed a custom ROM, you will not receive the official Android 4.1.2 Xperia SL update notification.
This tutorial will not void your phone’s warranty and any LT26ii user can apply this tutorial.
To update the Sony Ericsson Xperia X10 Mini Pro you need to install an alternate firmware (ROM).I have had the Sony Ericsson Xperia X10 Mini Pro for about two years, and its age is really starting to show.One weakness is the fact that it's still stuck with Android 2.1 (Eclair) with no update in sight. The developers from Sony Ericsson stated that they will stop the update support for present uiq3 phones (P990i, M600, W950)There is an Update Service solution available for your device.