Roaming 311-490 (Sprint): Is it the SIM?

I just ran a little test with my Moto G7 Power. My wife’s S20 5G has no trouble roaming 311-490 (Sprint) but I have not been able to roam that signal. I removed the SIM (TM9363) from her phone and put it in my phone, replacing my older (TM9252) SIM. As soon as the phone booted up I was able to roam 311-490. As soon as I put my SIM back in my phone, I’m no longer able to roam.

One data point, for what it’s worth.

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