Mint Mobile service vastly different between iPhone and Samsung

Hi! My husband and I both have mint mobile (he has an iPhone, and I have a Samsung S22 Ultra), and our service is vastly different when we are together. This is the second (unlocked) Samsung phone I've had where I've had spotty or no service while my husband has full bars in the exact same spot. Mint was great when I had an iPhone a few years ago, so I'm super disappointed in the awful quality of service I have on my phone now. I almost never have service when I need it. Has anyone had a similar issue and found a Fix?