Huawei Modem Unlock by Code – Do it yourself free.

Sergeymkl and fr3nsis reversed the Heawei firmware finally found a way to calculate the factory code from IMEI. Thanks for them for their hard work.
So now, you can get the factory code for Huawei or Vodafone 3G modem, absolutely free by online code calculator just with the IMEI of your modem.
Supported Models – Huawei

E156, E155, E1550, E1552, E156G, E160, E160G, E161, E166, E169, E169G, E170,E172 E176, E1762, E180, E182E, E196, E226, E270, E271, E272, E510, E612, E618, E620, E630 E630+, E660, E660A, E800, E870, E880, EG162, E880, EG162, EG162G, EG602, EG602G
Vodafone Models
K2540, K3515, K3520, K3565, K3520, K3565
How to:

Calculate unlock and flash codes via online calculator, we have uploaded one here
http://www.wintechmobiles.com/tools/huawei-code-calculator/
To enter code in USB 3G Modem, just follow these instructions :
1) open Hyperterminal
2) you must set com port on modem (Huawei Mobile Connect – 3G Modem)
3) type following command : AT^CARDLOCK=””
4) Validate by pressing Enter.
Or you can use this software who do the same job easier :

huawei modem code tool

Rapid share link – http://rapidshare.com/files/377803021/huawei_code_tool.zip
Another simple 25KB program  http://rapidshare.com/files/377801649/e5832_unlock.zip.html
Modem will be unlocked instantly. Any feedback or error report can be sent via comment.

Latest Huawei modems comes with customized firmware, therefore need to be flashed to unlock. Do not try if code unlock fails one time.If you think you can do some dirty technical experiment on your modem, post your model number and firmware version. Some one will help you to find the correct method and firmware file.