Steps to Unlock Airtel Huawei e1731 7.2 Mbps Usb Modem1. Download Universal Mater code generator form here2. After downloading3. Now enter your data card imei number as shown in above image, and it will generate your Unlock & Flash Code. For Example: From IMEI number (350123009876543), I have generated unlock code (33782920) and flash code (64073213)4. That’s it, Now insert any sim in your Huawei e1731 usb modem and wait 1 min.5. Now install Dashboard provided in Data card And Open it.6. Then, it will ask for Unlock code & Enter it. Now your data card is unlocked & You can use any sim inside it without any fear