I installed a lot of ROMs like XperianZe, Mahdi ROM, AOKP, etc
I think this device have an error in cache, when I delete cache in system, cwm the device freeze and I have to press the OFF button for 10 seconds.
The firmware .201 have a lot of lags, poor ram management, flickering bug, keyboard lag, restarts, etc
The firmware .254 have a bug with WiFi and Bluetooth and other bugs that not be fixed in 4.1.2 later in 4.3 with the .266 FW the device is unusable.
I don't know what I do with my phone, it works like a Galaxy Ace.
please tell me a ROM that be fast smooth no bugs, no lags,
The moto g of my girlfriend works better than this Xperia