Note 4 contacts app not working and contacts lost

[AC Question]

Contacts app on my note 4 has stopped working and lost name and numbers

 

[Crashdamage]

If you have been saving them to your Google (Gmail) account - and I *highly* recommend you do - you should be able to just resync them to the phone.

If you have been saving them to Google but now they are gone, this will restore them to any point they were at in the last 30 days:

https://support.Google.com/mail/answer/1069522?hi=en

If you did not save your contacts to Google and did not do manual backups, then sorry, but the contacts are gone.