Just follow the simple steps to unlock your Huawei E3276 usb modem using unlock code

remove default simcard from your E3276 huawei modem.
insert another network simcard.
connect modem to the computer usb port.
run the E3276 unlock tool(given in below link)
it will detect your E3276 imei and will ask for the unlock code.
enter your 8digit unlock code and enjoy with other network.

E3276 unlocker tool


for the unlock code contact :
@ Serviceteam Unlockers
kanniyappan2000@gmail.com