ipbone5s bottom screen is dark and not displaying however the option behind or i ons cunction if touched . the bottom potion for abot an inch is completely black during start and with lwhite lines after starting . these lines extends to full screen

Iphone5s

ios8.4 recently updated

issue with earlier version 8.3 too

iphone5s bottom screen is dark and not displaying

however the option behind or i ons cunction if touched

. the bottom potion for abot an inch is completely black during start and

with lwhite lines after starting . these lines extends to full screen

it is extremely difficult to operate

Tried restarting and reset (home and power button) issue still remains

contact me for more details

can send screen shot of issue

Natarajan