Question regarding adding a new line to my account

[BlueAngel]

So I am looking at adding another line to my account for my nephew who is turning 12 next month, he currently has a prepaid line with T-Mobile and the service is just terrible, there is absolutely no service in my house and most places he goes so we need a reliable service for him as he is young and we need to be able to get in contact with him wherever he is. I currently have a Nexus 5 under easy pay for $12 bucks a month. My bill is roughly $80 a month for my line. He really wants a Nexus 5 so I thought if possible I would give him mine and take the upgrade on the new line and pay the $30 a month for the Note 4. Is it possible to just swap phones and make this happen without messing anything up? Thanks for a speedy answer as I looking to do this sometime this afternoon.

[BlueAngel]

All worked out, rocking a Note 4 now. This can be closed.