I have bought this phone one and half years back.i would say this is worst thing that happened to me that year
After one month the phone started heating, I couldnt play games, I couldnt use internet for a continuous period of time if I did it would automatic shut down due over heating.
Then slowly the battery backup get reduced.At first I able to use my mobile for 2 days after full charging.Now I could barely use it for 4-5hrs.
Due this problem I have visited Sony Service centre two times and they just changed the battery and charged me 1000
Dont buy Sony Xperia Z1.If you did you will regret it