Hello!
It looks like you have a iPhone 6 Plus. Apple has determined that some iPhone 6 Plus devices may exhibit display flickering or Multi-Touch issues after being dropped multiple times on a hard surface and then incurring further stress on the device.
If your iPhone 6 Plus is exhibiting the symptoms noted above, is in working order, and the screen is not cracked or broken, Apple will repair your device for a service price of $149. This is a board level issue, and can not be fixed any other way than a total device replacement. Back up your device before bringing it to an Apple Store or Authorized Service Provider.
Below are links that may help
https://support.apple.com/iphone6plus-multitouch
https://support.apple.com/en-us/HT201557