When i did sync my iphone 6s with my icloud i was able to use the backup from my iphone 4 ( i got the iphone 4 after the 4s as a temp to use while i look for a better phone but it ended up stop working too ) i only god a few contacts that i put on the phone while using the 4 . so if i did set my contacts to sync with my apple id how would i do this ?