The process to unlock your Nighthawk device:
Please follow the step by step process as follows to unlock your device:
Step 1:Insert your new SIM card.
Step 2:Power on, and connect to your device.
Step 3:For Velocity 2 and Nighthawk: Go to http://attwifimanager & set up your device.
For Homebase: Go to http://att.wirelessinternet & set up your device.
Note: Some devices will have an “enter unlock code” message pop up as soon as you log in. You can enter the code there. If not, continue with step 4.
Step 4: Go to settings, and select the Security tab.
Step 5: Go to SIM Security
Step 6: Click "Enter Unlock Code"
Step 7: Enter the unlock code provided, you should see a green box that says Unlock Code Accepted.
Step 8: If you see a red box that says Unlock Code Invalid, double-check that you entered the code correctly.
Step 9: Check your device and make sure that the light is blinking blue and you can connect via a wifi connection.