Huawei E173Cs-1 Airtel India, E173z-1 MTN Sudan detect and unlock guide

Unlock procedure will work on E173Cs-1 Airtel India and E173z-1 MTN Sudan modems with these firmware versions:
21.157.31.00.1043 (Build: Apr 23 2012 12:02:27)
21.157.31.00.284 (Build: Mar 17 2012 12:15:53)
21.157.13.00.284 (Build: Feb 16 2012 11:05:38)

Download firmware update

Extract archive and launch “DriverSetup.exe“.

Click "Start".

Click start in update wizard

Wizard will detect modem and ask for firmware code.

Click start in update wizard

Launch DC-Unlocker client software.

Launch DC-unlocker

Open Server tab, enter your username and password that you received after credits purchase. Click "Check login". (you can buy credits here www.dc-unlocker.com/buy)
If DC-Unlocker/Vygis/Rocker/Infinity dongle is connected, do not enter username and password, only click "Check login".

Check login

Select manufacturer: Huawei modems, model: Huawei E303, proceed to "Unlocking" tab.

Select Huawei modems and model E303

Select "Generate Firmware code by IMEI".
Enter IMEI number.

Select manufacturer and press detect button

Click "Do job" button.
Software will generate firmware code.

Press do job and firmware code will be displayed

Enter generated firmware code to firmware update wizard and click "OK" button.

Copy generated firmware code to update wizard

Wizard will start to update modem firmware. Do not disconnect modem or turn off computer – you can damage modem.

Click start in update wizard

Remove SIM card from modem.

Launch DC-Unlocker client software.

Launch DC-unlocker

Open Server tab, enter your username and password that you received after credits purchase. Click "Check login". (you can buy credits here www.dc-unlocker.com/buy)
If DC-Unlocker/Vygis/Rocker/Infinity dongle is connected, do not enter username and password, only click "Check login".

Check login

Select manufacturer: Huawei modems, model leave Auto detect (recommended).Press "Detect" button (Big magnifying glass).

Select Huawei modems

Wait till DC-Unlocker fully detects modem.

Modem is fully detected

Open Unlock tab, select “Read unlock code and auto enter to modem”.
Click “Do job”.

Press unlock in unlocking tab

Wait till you see a message that modem is unlocked.

Huawei e173cs unlocked

After you see that unlock is successful, restart modem.

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