try being more careful sa position sa cable in that its inserted straight and properly ang the cord is not apply pressure on the phone in odd angles.
to manage contacts, easiest way i found was thru GMAIL contacts interface thru ur browser. chrome browser on your mac should be perfect. you can import contacts from both phones and just click merge duplicates in the menu and your done

you can copy past url on the pictures from fb of your contacts to add photos in each contact very convenient. no need to save and upload. then on the phone make sure you set the phone to save contacts using the gmail account so that i makes a backup whenever you add anything or updates the gmail contacts when you delete something on your phone. this way if you restore your phonr or it gets damanged or lost, just buy a new one and input your gmail account and all ur contacts are on your new phone. autosync is sweet!!