For mobile devices, you can use dedicated labeling apps to print over Wi-Fi:
That’s it! The Wi-Fi settings are now saved on your XP-420B. xprinter xp420b wifi setup
Load a roll of standard 4x6 thermal labels into the printer. Connect the printer to your Windows PC using the USB cable. For mobile devices, you can use dedicated labeling
For printing directly from your phone to the label printer, Xprinter recommends the . Once you have the Wi-Fi or Bluetooth established, you can open the Xlabel app, search for your XP-420B device, and start designing and printing labels wirelessly . Connect the printer to your Windows PC using the USB cable
Turn the printer off and back on to finalize the network connection. Phase 3: Printing a Self-Test Page (Verify Connection) To confirm the WiFi is working: Turn off the printer. Hold down the Feed button while turning the printer on. Release the button after a few seconds.
Ensure the WiFi password is correct and that the router is operating at 2.4GHz, not 5GHz, as many thermal printers only support 2.4GHz.