D-Link DIR-412 User Manual page 6

Create a new password and then click Next to continue.
Select your time zone from the drop-down menu and then click Next to
continue.
Configure your 3G Internet Connection settings and then click Next to
continue.
 APN is provided to you by Exetel.
 Leave the
Username and Password
(CONNECT or EXETEL1, depending on the plan)
field BLANK