Most USB Modems and WiFi Hotspots are compatible, but it is important that you check.
Your USB Modem or WiFi Hotspot must be unlocked to use the USA sim card. REPEAT: Your USB Modem or WiFi Hotspot must be unlocked to use the USA sim card.
Most USB Modems and WiFi Hotspots are compatible, but you'll need to check if your device uses any of the following AT&T frequencies:
- 3G/UMTS 850/1900 MHz
- 4G/LTE Band 2 (1900 MHz), Band 4 (1700 MHz), Band 5 (800 MHz), Band 17 (700 MHz)
You can do a Google search for you device, and search for its specifications and check the frequencies that it operates on.