Republic wireless app not compatible

I just got the galaxy s7 edge and I downloaded the app for republic wireless (the 3.0 one) and its saying my phone isn’t compatible even though it is. I’ve completely updated my phone and its still not working. I also took the sim card out of my old republic wireless phone and placed it in this one. Still nothing. How do i get it to work?

Moderator’s note: content edited for clarity

Did you buy the phone from RW or from another source?

Was it brand new or used?

When you look under

Apps -> Settings -> About Device -> Model Number

Do you see SM-G935U?

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