The iPhone device must be 100% Clean:
- No Outstanding Balance with C Spire
- Not reported as Lost or Stolen
Absolutely no refund if wrong network provided, make sure you run an Apple GSX Check report to be 100% Sure that the Next Tether Policy show the device is from "C Spire Wireless".
Next Tether Policy ID: US C Spire LTE Policy
Finally, make sure the IMEI is Clean & recognized on C Spire Website: