Screen is working ghost image

Go to Settings > Accessibility > Touch > 3D & Haptic Touch, then adjust any of the following: 3D Touch: Turn on or off. 3D Touch Sensitivity: Choose the pressure needed to activate 3D Touch—Light, Medium, or Firm.

Adjust touch settings on iPhone - Apple Support

Smart Phones neither have the intelligence nor has the hostility. Hence we need to look at our device settings and the way we synchronise our smart phones with Mac/PC/iCloud and also how careful are we in sharing our sensitive and valuable informations with friends and family members.

Be careful when sharing the device's sensitive and valuable informations with friends and family members.

Thumb Rules:

1. Enable  Guided Access before handing over an iPhone to kids
2. Don't share Apple IDs
3. Don't Jail Break
4. Don't share sensitive informations pertaining to your device and payment methods
5. Beware of Phishing