I use 2 iphones with different numbers and different contacts.

Question

These iphones (a 4 and a 4S) are used as local phones for 2 different countries. As a result I end up adding contacts into the iphone that I am using at any given time. However, the contacts are common and may be required from the other iphone as well. THe iphones have different names and are backed up separately. How can I ensure that if a contact is added to one is also automatically updated to the other? If not automatic, how do I sync them to a common contact list which keeps accreting contacts from both?

Answer 1

syncing contacts, with either iCloud or iTunes, mean all contacts or nothing. You can set up iCloud, that means adding a contact to one iPhone it will automatically appear on the other one, but all the other contacts will be on both phones, including the ones you might not want there, if you insist on keeping part of your contacts seperate.
If you don't mind having all contacts on both phones, do the following on both devices:
Go to Settings - iCloud - login with your Apple ID - turn on Contacts.
Hope this helps
Stijn