02-09-2013 05:53 AM
Welcome to BlackBerry Support Forums
May I know what you exactly want ! BBM uses our device PIN which you cannot change , If you want to use it fresh then delete those Contacts that you don't want , But those who already know your PIN may send you request and you have to Block them if you don't want them on your Contact list.
02-09-2013 11:36 PM
You are most welcome .