Can you remove device thru app or do you have to call?
To cancel service or remove a line permanently: Call Customer Service at (800) 392-0717, (Mon – Fri, 7 AM - 9 PM, Sat – Sun, 8 AM – 9 PM local time).
From Suspend Service FAQs
We certainly don't want to lose you and I'm here to help. May I ask why you no longer want to be a member of the VZW family? Please update me with your concern. Additionally, I will be sending you a Private Message momentarily.