Solved! I am using my last phone is Samsung A8

[ksmohsinks]

I am forget my all contact number I want to know my contact number

 

[hang-the-9]

Your contact number as your own phone number? Should be in the settings on the phone in about phone and you can also contact your service provider or one of your friends that has your number saved. If you are talking about your saved contacts, you need to get them from a backup. If they are gone and you did not have them saved somewhere like your Google account or the service providers online storage, they are gone.