how to backup cell phone contacts to gmail, and view them on pc
Go to Settings &gt; Accounts - Google &gt; Tap on your account &gt;. Now
select the checkbox for Contacts and see what is the last synced
date and time shown below.
Now login to your Google account and go to Google contacts. You will
be able to see all the synced contacts


From Panel:
Make sure you export all your contacts from sim/phone to gmail account via phonebook, then sync contact again through the direction given above.