There's no need to talk to him like he's stupid. He obviously doesn't know that much about BlackBerrys. I would suggest just adding people on both devices. This should work - though it may take awhile if there are loads of people on your list.
This solution only works if you don't use both phones at the same time:
I'm assuming you have BBM 5.0 here
Back up your contact list into your email address in the phone you are currently using.
Whenever you are not using one phone, turn off your data and then on the other retrieve your contact list with the same email address. You can do this as many times as you want/need. I do it all day every day and I never lose contacts.
CrackBerry is in no way Affiliated with BlackBerry. We take pride in our unbiased content, however do occasionally receive free products from vendors that we review or discuss. For more info click here.