If you rather go for something that can unlock your Huawei modem within seconds for free instead, check out the following three unlock code generators.
Online Unlock Key Generator
On this site, getting your modem’s unlock code is as simple as entering your modem’s IMEI, enter the CAPTCHA code and click on the “Calculator” button.
Within seconds, it will return you with your modem’s unlock code and flash code.
Supported Huawei modem models:
E1550, E155, E156, E156G, E160, E160G, E161, E166, E169, E169G, E170, E172, E176, E180, E182E, E196, E226, E270, E271, E272, E510, E612, E618, E620, E630, E630+, E660, E660A, E800, E870, E880, EG162, EG162G, EG602, EG602G
Huawei Unlocker is another simple and straight forward free unlock code generator. Enter your modem’s IMEI, hit the “Unlock” button and consider yourself done. Again, no installation required.
Download Huawei Unlocker
Unlocking The Modem with The Unlock Code
To make use of the unlock code, insert an unauthorized sim card to your Huawei modem. Unauthorized sim card meaning sim card from any operators other than the one the modem is currently locked to.
When you do so, you would be prompt for the modem’s unlock code. Just enter the unlock code you have received earlier and voila, you can now use your Huawei USB modem with sim cards from any other operator.
I have tested it on my E1550 and it worked perfectly.
Huawei Modem Code Writer Tool
If your modem doesn’t prompt for the unlock code even after you have inserted an unauthorized sim, you can use any of these two code writer tools:
Download Huawei Modem Code Writer: