Anyone fed-up with horrible coverage from TMobile

Try their 5g home internet. Mine looses the signal as the day goes on.Guarenteed by 2pmest I'll be at the blazing fast speed of 1.0mps. When I called,they said it was a problem with the firmware in the moden that ran fine up until 2 weeks ago, They overnighted a new modem(I have a feeling it was refurbished as it didn't come with a power cable). Plugged that one in and it started to turn itself off and back on for what seemed like every 15 minutes. I was on the phone with customer service and the tech support for at least an hour and a half on friday. They wanted to send out another modem until I asked if this one could be returned to the store where I signed up at. When they said yes,first thing saturday morning I was there. They gave me a different make. Plugged it in and so sooner as the afternoon hit,The internet slowed to a crawl. Did the tap dance of moving the modem to different parts of the house and ended up with it back in the spot where the original was. I went on twitter and posted the speeds I was getting and got someone from tech support who claims they have a fix for my problem,but can't do anything until wensday. Unreal. If I stop payment on my bill,they'll shut my service down,But they can give crap service and you get to take it and wait. Now I see their new modems have a hook up for and external antenna that you can purchase for a mere $99. I have a sneaking suspision thats the fix that's going to be coming through on Wensday.