How to backup phone contacts

Hi friends today I talk to you how to back up your phone contacts when you change mobiles.
It is very easy and very help for us.
Please understand following information.

1.Go to seeting of your mobile

2 click Account -> Choose ads account

3.Click on Google and fill with your working email

4.Sync your datas like app information, contacts etc..you must tick√ on contacts and sync it.
It will take few minutes.

5.Now your all contacts saved in Google account.
Now you can sign your new phones by using this email then you will get your contacts.

If you didn't understand?
Just watch this video
Click for video