Iphone id

Some things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone, iPad, or iPod touch         

Try a forced restart.

Reset Device.      

If necessary

Hard reset.        

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Restore - If you see an error when you update or restore your iPhone, iPad, or iPod

Backup - Restore your device from an iCloud or iTunes backup.      

Hello geenhoy,

Welcome to Apple Support Communities!

If we understand your post correctly, you're receiving a message saying Unable to sign in because of a problem communicating with iCloud. We're happy to help!

Below is an article that will provide some help for signing into iCloud.

If you can't connect or sign in to iCloud

Let us know if you have any questions.

Thank you for using Apple Support Communities.

Take care!