TATA DOCOMO 3G Huawei E177 does not support BSNL Network Configuration.
- May be some bugs in Modem Firmware
So if you want Use BSNL Sim then follow this step..
1. Downgrade Modem Firmware
i.e. E177 Firmware : 177DT02.113
to
E173 Firmware : 11.126.15.00.00
2. Enjoy all sim working with Your Huawei E177.
3. If Need flash code then calculate from given Unlocker here.
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