Literally, most version and model of huawei usb modems are simply unlocked with the traditional USB modem unlocker software that works on the techniques of generating huawei usb modems unlock code and flash code.
But the reverse is the case for novel huawei USB like huawei E303, E357, E69 etc. as their respective unlocking process is difficult and hard to successfully complete.
First, remove it from your mind that you can unlock this modem free because you will need to cough out little money to get it done...
REQUIREMENTS:
1) Dc-unlocker software, download link is below
[You must be registered and logged in to see this link.][You must be registered and logged in to see this image.]After a successful download and saving of this software on folder/location that can easily be accessible then, Plug in your huawei usb modem(s) whose unlocking code you could not easily generate from the normal huawei unlocker tool.
Click on the buy "Credits button" to create account with DC Unlocker then pay your 4Euro charges through Paypal option to receive password from Dc Unlocker.
Make sure you click on Checking Login with your username and password send to you by Dc Unlocker
Then in the Unlocking Tab, select the Generate Unlock Code by IMEI and click on Do Job, then wait for the new code from Dc- unlocker server, then put your new number into request menu number..Hurray u now have universal modem
[You must be registered and logged in to see this image.]2) Dc-unlocker username and password ( that is where the charges come for the password)
3. make sure you have active internet before you begin this journey
4. Also make sure you insert third party sim into your modem