Here is an update about the E303 Modem Unlock. Sometimes it Might be difficult but Impossibility can never be the Answer. Some of you Might have tried in Several ways to unlock their E303 Modem all to no Avail. I personally Have Unlocked Some but the Truth is this, Not all the E303 MODEMS are the same, And so Does not Follow the Same Procedure to Unlock.
1. Download Universal Master Code Calculator so that we get the FLASH CODE
2. After downloading it Put the IMEI and get the FLASH code that we are going to use them as a PASSWORD.
3. Download HUAWEI E303 firmware update here
4. Unzip the file and make sure the modem is connected and it has been installed with the SIM card inside it.
5. Quit the dashboard if its open and run the update, wait and when it ask you for the PASSWORD input the FLASH CODE you got from Universal Mastercode Calculator.. Wait for about 3 min and your modem will be unlocked PERMANENTLY.