So i installed a Novatel 5804/e371 wwan card into my dell m4700 laptop and i have installed all drivers and even novatels dell software but i have tried time and time again to get a connection to no avail. It recognizes my sim but will fail to get any connection what so ever. Is it just not compatible with tmobile or sprint and only works with at&t but the card is said to be compatible with tmobiles band and if so what other card can i use that will allow my dell m4700 laptop to have 4g lte speeds since the cards are around 20 bucks no harm no foul.