Are they in your iCloud account? If not, then proceed with the steps below. Go to Contacts and then search for some contacts you know are on your phone. To do this, first go to and type in your username/password combo. First, determine whether or not you have contacts on your iPhone that are not syncing with your iCloud account.
At the end, we had to do a little work around to move the contacts that were listed as “On My iPhone” to her iCloud account. It took us a while to figure out what was going on. When she did that, the contacts were added directly to her iPhone but they did not automatically connect to her iCloud account. When a client of mine purchased the new iPhone, she exported all of her contacts from her Blackberry to her iPhone.