How do I transfer my AT&T gophone from HTC Desire 610 to Samsung Note4?

[BBQMAN61]

Both phones are owned by me. Is it as simple as switching the sim card?

 

[B. Diddy]

Welcome to Android Central! That should be all you need to do. Make sure your exact Note 4 model is compatible with AT&T:
att.com/cellphones/prepaidphones/sim-card-kit-phone-prepaid.html#sku=sku7420309