We passed my wife's Galaxy S7, which she's used over a year on Cricket, to my daughter. We put her Cricket SIM card, which she had on a 4G LTE Cricket phone for over a year into this one and now it's considered incompatible. Took it to the useless store, who tried to sell me a crap phone. Why all of the sudden this 4G phone and 4G SIM are "incompatible?" It's up to date and everything.