AirPrint function with T-Mobile internet router

Hi,

Information about the exact printer and router models would help.

However, I guess that it would be correct to assume that the Brother printer is listed as a supported model in About AirPrint - Apple Support.

To begin with, check that the printer and the iPad are on the same Wi-Fi network. If the Brother model in question has Ethernet (in addition to or without Wi-Fi), you could wire the printer to a LAN port (if available) of the Wi-Fi router instead. An Ethernet printer connection is often more stable, and may solve some problems related to the use of modern dual-band routers.

In case of difficulties recognising an AirPrint printer, it is often a good idea to try a full power cycle sequence in this order (do not forget the router):

Power off the Wi-Fi router, the printer, the iPad, and any Macs/iPhones/other computers and devices. Wait two to three minutes. Power on the router. Wait two to three minutes. Power on the printer. Wait a minute or two. Power on the iPad. Finally, power on any Macs/iPhones/other computers and devices.

See:

• Use AirPrint to print from your iPhone, iPad, or iPod touch - Apple Support
• Connect an AirPrint printer to a Wi-Fi network - Apple Support

Apple AirPrint is a driverless connection protocol. A high proportion of modern printers intended for Home, SoHo and Business environments now support AirPrint. Check your printer model against this list:

About AirPrint - Apple Support

If your printer supports AirPrint - and is set-up correctly - should you continue to experience difficulties your Wireless Broadband (a.k.a. MiFi) Router may not be passing Apple Bonjour traffic on its extended WiFi network - or may simply be blocking this (or other) device discovery protocol(s).

Given the type of router that you are using, your issue is unlikely to be due to subnetting issues. You may find that your router has a setting that limits/restricts broadcast and network discovery traffic; by example, if your Router has an IGMP Snooping setting, try toggling this or similar settings.

The Apple Bonjour protocol uses mDNS (Multicast DNS) UDP port 5353.

You may find that restart of your Router and iPad will resolve the problem. Your MiFi router will have appropriate instructions for restart. For iPad:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.

• On an iPad with Face ID: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

If you continue to have difficulties, check to see if your iPad is using the new WiFi Private Address feature. This feature is intended to provide additional privacy and security when using “public” (untrusted) WiFi networks.

Settings > WiFi > [Your WiFi Network / SSID] - tap the “i” icon - Private Address

The Private Address feature is largely unnecessary for trusted WiFi networks; if enabled, Private Addressing can interfere with anticipated operation of other devices, such as AirPrint/Airplay. In such circumstances, you may need to disable this feature - and can be enabled or disabled for each individual network.

Use private Wi-Fi addresses in iOS 14, iPadOS 14, and watchOS 7 - Apple Support