DC-Unlocker is a great software and with powerful team has recently launched DC-unlocker client software V1.00.0987. DC-Unlocker team has almost all modem solution, but make sure that DC-Unlocker software is paid and there is nothing free in DC-unlocker.
In DC-unlocker client software V1.00.0987 added unlock support :
Huawei Vodafone K3772
Huawei E173 11.126.29.01.408 Jul 20 2012 16:16:33 (Airtel Nigeria)