[nmglug] LTE 5G modems suggestions.

Does anyone have suggestions on a linux friendly lte / 5G modem? Not a hot spot but a USB direct connection and a cheap service? I bought the 4G LTE generic from Walmart (link below) and Linux sees it fine but all the providers I have tried say the unit is not compatible with their service. Looking for a compatible modem and some suggestions on a provider. Preferably cheap... https://www.walmart.com/ip/Unlocked-4G-LTE-USB-Modem-Mobile-Wireless-Router-...