Yesterday I have lost all the contacts on my GT-I9000. The device was left alone for 5 minutes & when I checked it again for some work, I found that the contact numbers had been lost & I am not able to find them. Is this a common problem with GT-I9000? Is there any way to get the contacts back?
I don't know how you lost them or if its a common problem. But you definitely can get back the lost contacts provided they were synced with Google Contacts(not SIM contacts).
First try to sync and see if contacts come back. If we cleared data of "Contact Storage" from Manage Applications, all the synced contacts in phone will disappear until you sync back again.
If that doesn't help, Google Contacts fortunately has restore option. Open Gmail, go to Contacts, Select More and select Restore contacts.