My TMobile 5G Router/Gateway based home-internet access is dropping randomly almost daily now in zip:07746

Zip 85748 -  rural area, but have (or say had) great LTE and 5G connectivity with the Nokia home gateway and my apple and android phones.  Last two months has been a nightmare.  Mutilple drops per day (even though the gateway says connection very good or on a phone showing 5GUC and 4 bars).  Have spent hours on the phone with T-Mobile - absolute waste of time.  Everyone should file an FCC Complaint: https://consumercomplaints.fcc.gov/