How do I get my hp printer 6400 connected to the internet

[Chrysalis2]

Just looking to see if someone can help me in the community to help set up my printer hp 6400 to my smartphone 

[Jay_G24]

Hi @Chrysalis2,

I'd like to help!

To assist better -

What phone are you using the printer with, Android or an iPhone?

Are you trying to connect the printer to a home or public network?

I would like to know, is your router set to work on 2.4 GHz network or 5 GHz network band?

Meanwhile, follow the instructions to connect the printer to the network

Connect the printer with WPS

If your router supports WPS, use these steps to connect your printer to your wireless network with the WPS button on the router.

1. Turn on the printer.

2. Locate the WPS button on your router, but do not press it yet.

   If your router does not support WPS, skip to the next step to connect the printer with the HP Smart app.

3. On the back of the printer, press and hold the Wireless button  and Power button  at the same time for 3 seconds.

4. On the router, press and hold the WPS button for 3 to 5 seconds or until it shows that the WPS connection process has started.

   NOTE: 

   The printer stops searching for a WPS connection two minutes after the wireless button is pressed. If you were unable to press the WPS button within that time frame, attempt these steps again.

   Once the printer connects to the wireless network, the purple Wireless light on the control panel turns on solid.

You may also refer to -(HP Smart app)

Hope this helps! Keep me posted. 

And, Welcome to the HP Support Community. 

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[Lisalisabrooks]

What is a WPS button? This 6400 has been THE most convoluted setup. Crazy. Hot it to work on my android and now the wifi icon will nnnnnot illuminate. I will try the 3 second hold. But the WPS thing is above my pay grade!

[Jay_G24]

Wi-Fi Protected Setup (WPS) is a feature supplied with many routers. It is designed to make the process of connecting to a secure wireless network from a computer or other device easier.

You may also connect the printer using the HP Smart app

Restore network default settings on the printer

Prepare a printer for a Wi-Fi connection by restoring its default network settings.

When the settings are restored, the printer enters Wi-Fi setup mode for about two hours, making it discoverable during the HP software installation.

• Most printers with a touchscreen: From the Wireless  or Setup  menu, select Network setup or Settings, and then select Restore Network Settings.

• Most inkjet printers without a touchscreen: Press and hold the Wireless  and Cancel  buttons until the Power button flashes, and then wait for the Wireless light to flash.

• Most Laser printers without a touchscreen or control panel menu: Press and hold the Wireless button until the Attention  and Power lights flash, or press and hold the Wireless  and Cancel  buttons until the Wireless light flashes (Laser NS, Neverstop). The printer might restart.

• Most LaserJet printers without a touchscreen: Press and hold the Wireless button  until the Attention light  flashes, and then wait for the Wireless light to flash.

• Envy 6000, 6000e, 6400e, ENVY Pro 6400, DeskJet Plus IA 6000, 6400, and Tango printers: Press and hold the Wireless button  on the back of the printer for five seconds until the Status light flashes (blue or purple depending on the model).

Go to Restore Wi-Fi setup mode on your HP printer for additional information and button presses for more printer models.

Install HP Smart

Install the HP Smart app on your computer or mobile device.

Do the following if you are setting up the printer on a Wi-Fi network.

• Place the printer and the computer or mobile device near the Wi-Fi router.

• Turn on Wi-Fi on your computer or mobile device and connect to your network. If the computer is connected to the network with an Ethernet cable, temporarily disconnect the cable and use the Wi-Fi connection during the setup.

• Enable Bluetooth on the computer or mobile device so that HP Smart can detect the printer during the setup.

• After installing HP Smart for iOS and Android, enable the mobile device location service and allow the app to use your location to detect the printer and offer solutions during setup.

1. Download the HP Smart app from 123.hp.com (Android, Apple iOS, iPadOS), HP Smart - Microsoft Store (Windows), or HP Smart - Mac App Store (macOS).

   If you are prompted to sign in with Microsoft to use the app across devices, you can sign in or click No, thanks to continue.​

   NOTE: 

   Disconnect from a Virtual Private Network (VPN) connection before downloading.

2. If you are setting up HP Smart for the first time, you must create or sign in to an HP account to access all printer functions.

You may refer to-Wi-Fi connection is lost after a router or network settings change

Hope this helps!

Keep me posted!