One important thing is that this modem supports only WIMAX 4 G. This means you can not use it in a 3G CDMA EVDO Rev.A network, or CDMA 20001xRTT.
The problem is, whether the signal 4G Wimax good enough at your place? It's doubtful many people remember the EVDO Rev A 3G signal still has not been broad enough to reach certain areas.
You need to upgrade to 4G (Sprint) if you have a plan to use this modem U1901. The device is built to work specifically with the only Sprint 4G Network.
Sprint U1901Specifications:
Network : WIMAX 4G (Sprint)Type : USB Modem
Chipset: Beceem BCSM250
Compatibility: Windows Vista, XP, 7, Mac OS 10.5, 10.6
Weigh : 0.9 ounces
Length : 3.15 inches
