Added :

Customized modems:

Huawei E3276 (21.263.03.01.284 India Airtel)
Unlock without firmware change.
Guide : https://www.dc-unlocker.com/huawei-e3276-airtel-unlock-guide

Huawei E303h-1 (21.318.25.00.787 Tigo Tanzania)
Unlock by firmware change.
Guide : https://www.dc-unlocker.com/huawei-e303h-unlock-guide

Routers :

ZTE MF612
Direct unlock by network cable.
Guide : https://www.dc-unlocker.com/zte-mf612-detect-unlock-guide

Customized routers :

Huawei E5372 (21.270.11.00.1151 Bolt Indonesia)
Unlock without firmware change.
Guide : https://www.dc-unlocker.com/huawei-e5372-bolt-detect-unlock-guide