i purchased i pad air 2 128 GB WiFi model on 18 September 2015 it is showing some black spots if slightly pressed or tap right back side

Hello Sayed,

If you're seeing some discoloration in the screen of your iPad, then I suggest that you follow through the steps below.

If you see lines, missing sections, discoloration, or poor image quality

1. Try to restart your device. If you can't restart, force restart your device.
2. If this doesn't work, restore your device.
3. If you still see the issue after you restore, contact Apple Support.

Take care.

Hi

If the advice given does not help make an Appointment at apple store .

Cheers

Brian