We are looking to have configured on Ubuntu 10.4 the following modems to dial
Verizon modem on LTE connects in PPP but requires Authentifaction string to complete the process
Sprint 3G/4G Dual Mode Sierra 250U wireless modem seems native support in Kernal so setup should be OK
AT&T USBConnect Momentum 4G (Item SKU: 65256) this will require full investigation
T-Mobile® Rocket™ 3.0 4G Laptop Stick this will require full investigation
Bidder should be US based as they will require local hardware and access to US networks.