Well, Hello there guys and thank you for your time fore reasing this issue of mine.
I've had my xperia for more than 8 months already, but lately there has occured several issues with it and i took it to sony guarantee service. the smartphone has small damage on the left corner of the phone there aren't scratches on the screen and other areas (as you know XZ1 has very sharp edges so it's really easy to damage the corners) the guarantee service refuses to fix smartphone's problems because of the given minor damage. I understand that damaged smartphone can get the guarantee cancelled but the damage is minor, and it couldn't have affected any part of the smartphone.
The problems my smartphone had were following: wifi problems it was disconnecting to wifi by itself and sometimes it didn't receive any wifi connection at all (restarting was solving the problem). Deteriorating camera ( i've compared it to my friends xz1's camera and the quality was comparably worse on my smartphone. both on auto mode)
P.S One more problem was white spots on the screen, and i've checked that it's widespread problem with xperia xz1 as well as wifi problem is widespread
