Just before Christmas, we saw a number of leaked screenshots relating to the Android 4.1.2 Jelly Bean firmware for the Sony Xperia T (LT30p). The screenshots came from a developer version of the firmware that would only work on development (‘brown’) handsets. Therefore, even if devs could find a way of extracting the firmware, it would not work on consumer Xperia T (‘red’) devices.
However, this hasn’t stopped DooMLoRD from xda-developers successfully porting the firmware to production handsets. As this is a leaked ROM and meant for developer handsets, expect performance to be buggy. Plus there are loads of features that don’t work including baseband, audio, Wi-Fi, Bluetooth and a chance of SD card corruption. If all that hasn’t put you off, but you’re desperate to see what’s in store with the JB update, then click here.