Huawei E1552 modem can be unlocked via firmware upgrade / downgrade solution. One need to just upgrade the firmware (Firmware can be downloaded via the link which is provided at the end of the article).
Users who want to unlock the modem Huawei E1552 need to follow the simple steps.
Step by step guide to unlock Huawei E1552 modem free :
1. Connect your modem to computer or laptop.
2. Let the modem install all the required drivers.
3. Make sure that you have sufficient battery backup.
4. Download the firmware from the link which is provided at the end of the article.
5. Now disconnect the Internet Connection and exit or close the Mobile Partner Software.
6. Now run the E155XUpdate_11.609.18.00.00.B418.zip which you have already downloaded.
7. Accept the agreement and Click ”Next”
8. Let the firmware to Detect your modem.
9. After detecting your modem, click on ”Next” button.
10. After a few minutes you will get finish. Just press finish button and you have done it.
Note : This step will ask you for password. Just use any tool from my blog to generate unlock code and flash code. Put flash code as password whenever it asks.