Write down what is supposed to connect
Before opening a setup app, decide whether the printer will connect to the router by Wi-Fi, by an Ethernet cable, or directly to one computer by USB. These are different arrangements. A USB connection to a laptop does not automatically make a printer available to every phone in the house. Likewise, a printer's own direct wireless network is not necessarily your normal household network.
Find the exact model number on the printer itself. Similar-looking models can have different connection options, and the first search result may describe another version. Use the manufacturer's setup instructions for that model and obtain any required software from its own support site. Keep the Wi-Fi network name and password available privately; neither needs to appear in a photograph sent to a public forum.
Pick the household network deliberately
Look at the network name on the computer or phone doing the setup. If it is connected to a guest network, the router may deliberately prevent it from finding local equipment. A household printer generally needs an arrangement that lets the intended devices communicate with it. Do not switch off the guest network's isolation just to make a quick test pass; use the main network where appropriate and retain the separation for visitors.
Check the printer's supported Wi-Fi bands before selecting a network. Some printers use only 2.4 GHz, while others support more than one band. This does not mean that every device must permanently use the same frequency. Devices on different bands can communicate through a correctly configured home router. The practical question is whether the printer can join the network and whether local communication is permitted.
During initial setup, place the printer where its connection is dependable, with the doors and furniture in their normal positions. A brief successful connection beside the router tells you little about reliability in a distant cupboard. Keep room for the paper tray and scanner lid as well as the cables.
Confirm the connection at the printer
Use the printer's screen or its documented network-report function to check which network it joined. Where available, the report can distinguish a missing connection from a computer that has simply selected the wrong printer entry. Treat that report as private household information, especially if it includes identifying network details.
Add the printer on one computer and give the entry an obvious name, such as the model and room. Print a small ordinary document. Then let the printer settle into its usual sleep state and try another page later. A successful first page is useful, but a wake-up test is closer to everyday use. Do not repeatedly add new copies of the same printer while diagnosing a problem; a list of nearly identical entries makes the next print dialogue harder to understand.
Add the other devices after the first one works
Once the first computer prints reliably, connect the other household devices using the printer's supported method. Test the functions you actually need, including scanning if the printer is an all-in-one. Printing support on a phone does not by itself prove that the manufacturer's scanning app is available or required.
Keep a short setup note with the model, connection method and chosen network name. Leave the password in your normal secure place. If the router is replaced later, this note helps explain why the printer needs attention while a laptop has already reconnected. It also gives a support person a clear starting point without asking them to guess how the printer was installed.
