Activating Used phone on Verizon.

I just bought a note 5 on swappa for Verizon. I cut my micro Sim for my g3 and put it in the note 5. When I powered it on it was automatically activated in my Verizon account. Is this a safe method of activating?

I normally add it with the imei on Verizons site and then turn on the phone.

This was plug and play. Am I good?