Good Morning @patricias.we4f8t,
For you and others who may be following the topic, please allow me to provide some context. Depending upon phone and location, Republic provisions cellular coverage with one of two network partners.
One partner operates a GSM network and is T-Mobile. Republic’s other partner operates a CDMA network and is Sprint. Your Moto G5 Plus is provisioned for CDMA cellular coverage using Sprint’s network. Active CDMA SIMs do not move from phone to phone, which is why you’re getting the incompatible SIM message.
Your new Moto G6 Play is capable of being provisioned by Republic with either GSM (using T-Mobile’s network) or CDMA (using Sprint’s network) cellular coverage, however, you’ll need a new SIM. Looking at the coverage maps in your area (the reason I asked for the zip code), either coverage option looks good.
I’m going to send some additional detail to you privately. Please don’t respond to that private message here in the public thread.