It’s not difficult to look for unlocking service for Huawei USB 3G modem online. Most of the time however, these unlocking service comes with a small fee. Some forums do offer such service for free—but you would have to wait for the kind soul to respond to your request, and God knows how long they will take. 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 Universal MasterCode As its name suggest, Universal MasterCode is capable of generating unlock codes for a wide range of device, which of course includes most of Huawei’s modem. E156 E155, E1550 E1552, E156G E160, E160G E161 E166, E169 E169G, E170, E172, E176 E1762 E180 E182E E196 E226 E270, E800,E870 E880 EG162 E880 EG162 EG162G EG602 EG602G, E271, E272, E510 E612 E618 E630 ,E620 E630+ E660 E660a As you can see, the unlock code generated is the same as the one generated by the online unlock key generator above. There is no limit how many unlock codes you can generate, meaning as long as you have this generator on your computer, you can unlock as many modems as you wish. No installation is required. Just download and start the application. Download Universal MasterCode: MediaFire | RapidShare (243 KB) Huawei Unlocker 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: MediaFire | RapidShare (196 KB) 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 E1762 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: MediaFire | RapidShare OR Download Huawei Code Tool: MediaFire | RapidShare P.s: SheepTech shall not be liable for any loss or damage caused by the following the guide above. Unlock at your own risk.