I did exactly this. Started using T-Mobile Home Internet (5G "trashcan" modem) back in 21.02 (same month I ordered Starlink); TMHI service has gotten progressi

I did exactly this. Started using T-Mobile Home Internet (5G "trashcan" modem) back in 21.02 (same month I ordered Starlink); TMHI service has gotten progressively better since that time. 21.12 I received my Starlink ultimatum ("if you don't cancel in 14(?) days we're sending your HW and billing you $100's more") and I decided TMHI @ $50/month (yes, completely unlimited) was sufficient. Also Verizon now has competing 5G and LTE offerings, so I figure worst case I (who have NO wired ISP option) at least have a strong backup plan. As another redundancy: everyone in my household has migrated to Visible cell phone service, which provides unlimited (but throttled at 5-10 Mbps) hotspot which we use maybe 2-3 times per month when TMHI service gets sluggish.