If you want, go ahead, but there´s some things you consider:
1. Camera option, very diferent (worst)
2. Video recording with the zoom sound (worst)
3. Bad Focus in low light in video and still image
4. You can not do anything cause the terminal warms up
5. Noise sound in media (walkman, calls, video) with "clear audio" checked
The stamina option works great, and speed is the same, I think
I´d like go back, I miss camera options,
But if you really want, try update using "Update Service" software from Sony.
WARNING: You will lost all data in the internal storage, so backup.
greetings!!
