Using Lexmark Mobile Assistant
Depending on your mobile device, download the Lexmark Mobile Assistant application from either the Google Play store or App Store online store.
From the control panel, navigate to:
> Settings > > Network/Ports > > Wireless > > Setup Using Mobile App > > Continue for Printer ID >
Tap Start Wi-Fi Setup, and then select the printer.
Select a Wi-Fi network, and then enter your credentials.
Tap Finish Wi-Fi Setup.