inconsistent internet

To expand on what copz1998 suggested, did you use the T-Mobile Home Internet app to try and identify the best location for the gateway? Fixed Wireless Internet (FWI) is unlike cable or DSL. Location is very important, and while I agree that frequently rebooting your gateway is unacceptable, the first line of defense is to find the best location for the KVD21. If your problem continues, I'd call Support and tell them you have a bad gateway and have them swap it out. There really is no reason for you to have to reboot the gateway so often. 

If you don't need to hook up an external router or access point to the gateway, check out putting the KVD21 in your attic. Often the signal is better the higher it is in the house. My gateway is in an entertainment center with RF glass. It will only connect via 4G LTE even though the tower Im connecting to has 5G. Like copz1998, I get better speeds in the early morning and evening than during the day. My range is from a low of 35 Mbps to a high of 70 Mbps. That's more than enough to stream on two TVs simultaneously, support three always-on Macs, iPhones and iPads and a lot of Amazon Echo devices, including security cameras. According to the gateway, I have 3-bars of service and about 40 devices connected, and I never have to reboot the KVD21.