How to Find lost contacts and synced them back to iPhone 4S on Mac

Some important contacts were lost on your iPhone 4S? Deleted a phone number of a friend or co-worker by careless? All of this may be fine if you have backup your iPhone4s before the contacts lost, you can restore from backup to recover lost contacts number. (How to only retrieve the deleted contacts from backup and without restore the whole iPhone). If you didn’t have backup, what should you do to find back the lost contacts on your iPhone 4S?  Continue reading