This procedure is risky and any mistake makes your device dead, so be careful while unlocking.
Arrange one USB 2.0 cable; if not then you can also use cut wire of mouse or keyboard. Dismantle the Huawei B310s-927 and solder wires as shown in below image. Solder the cables on opposite side of USB 2.0 port to the motherboard of the device.
Note: Don’t make any mistake. Use the corresponding cable to solder with the board as shown in above image.
If you have successfully done steps then you are now ready for proceeding with next steps.
Unlocking will be done remotely. For a single router, the remote unlocking charge is Rs. 800.
Users who want the full unlocking solution needs to pay Rs. 10,000 or 150 USD.