Most services are tied to a user account or phone number. PIN messages were associated with a phone. Easy to swap sims and phones to build ad hoc groups. Nexte

Most services are tied to a user account or phone number. PIN messages were associated with a phone. Easy to swap sims and phones to build ad hoc groups. Nextel was a little different… their walkie talkie function was not tappable. They became the phone of choice for street level dealers among others.