i cant sign in to icould could not cummunicate with sarvar

See -> If you can't connect or sign in to iCloud

If you can't connect or sign in to iCloud - Apple Support

Check also the network connection:

You need to have a good Service and/or Wi-Fi.

If they are On, turn Off Hotspot & VPN.

Charge the battery > 70%.

See alos -> If you can't connect to the App Store, iTunes Store, or other Apple services

If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support

-> If you tried all of the above steps and you still can’t connect, contact Apple Support.

iPhone 5, iOS 10

Sorry, you have an outdated iPhone, that may be the cause of the problem (hardware & battery).