Sony is the one of all brand costly mobile phone .its price very high camperison to other mobile .z ultra has good screen quality but another feture are bad cameprison to other .camera is not working well .i use this mobile last one year .its always hang and sudden sutdown .after 6 month mobile sound very bad and buffing .screen ppi density good but if you dont care about brand maney mobile avilable in market with very good quality of screen with low price in comperison in sony .its battery backup is very bad after 4 to 5 month .if watch video its battery drain in 1.30 or 2.00 hours and need to plug in .thank u