How to change the firmware of the Huawei E303 customized modem?
1. Download all the software and firmware from the link provided at the end of the article.
2. Now run Universal Master code software, go to the Huawei tab, and generate flash code according to the IMEI for your modem.
3. Now run the download firmware file of the Huawei E303 modem, and when it asks for a password, then provide the flash code (which you generated earlier).
4. Now wait for Finish.
5. Now, close the software, dashboard, or connection manager if it opens automatically.
6. Run the CardLock_Unlock tool.
7. Now put your 8-digit unlock code into the unlock code box and click on OK.
8. Now, you will get a message, “Unlock Success.”
Note: Don’t enter any wrong unlock codes into your Huawei E303 modem; it has new security. Comment below to get the unlock code.
Download Huawei E303 Firmware Upgrade
(Firmware Version 21.157.31.00.850)
Download Universal Master Code Tool
Card Lock Unlock Tool (Password of the zip file: modemunlocksolution.blogspot.com)
Note: Huawei Hilink modem firmware starts from 22, don’t try the above-mentioned firmware in a normal Huawei dongle.
