Dell TrueMobile 2300 Faq page 21

How do I restart or reset the Wireless Broadband Router?
To restart the Dell TrueMobile 2300 Wireless Broadband Router, unplug the power connector and plug it back in.
To load the Dell TrueMobile 2300 Wireless Broadband Router's default settings, hold down the reset button on the router for
at least five seconds. While the unit resets, the Power light blinks.
NOTICE: When you reset the Dell TrueMobile 2300 via the reset button, press it for at least five seconds, the
current configurations will be erased and the
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factory default settings will be loaded on the unit.