AT&T, Modem, models:

AT&T USBConnect Force 4G	Quick Start Manual
DataPort 3705	User Manual
FIRSTNET AirgainConnect AC-HPUE	User Manual
High Speed Internet Service	Self-Installation Manual
IIM2100M	Quick Start Manual
Paradyne COMSPHERE 3900 Series	Installation Instructions
RM 5400	Manual
USB800	Let'S Get Started
USBConnect Mercury	Getting Started Manual