DC Unlocker is a famous software which unlocks all types of modem available in the world. It supports almost all models of Huawei, ZTE, Micromax, etc. Recently the team has updated his software to version 1.00.0928.
Huawei E173Bu-1 (Airtel India) (detected as E1731 11.126.29.00.284 Aug 13 2012 19:28:09)
Huawei Ascend G300
In DC Unlocker v1.00.0930, the firm has fixed the bugs of Vodafone R205 and E173Cs-1 Airtel detecting. Interested users can download this software from the link which is provided at the end of the article.