As name suggest sony .
Perfection in its all product .sony z1 is a ultimate phn with grt processor and gpu but now this phn is outof market bcoz of new phns.
Camera is superb.grt touch and nice display
The phn look is awesome due to no bumps and glassy smooth finish at back.overall look of phn is diffent and eye candy.
During playing games such as aspalt 8 and on multitasking phn become hot as hell.and start hanging.
Its a 3g phn with single sim so.dont waste ur money on 3g phn.
sony xperia bcome outdated so.plzz dont buy it u can get 4g.phn is this price.