I have brother printer model MFC L2705.but cannot connect to AirPrint

Hi,

To begin with, have you checked whether the printer firmware has been updated?

https://support.brother.com/g/b/producttop.aspx?c=us&lang=en&prod=mfcl2705dw_us

Any change if you try the following power-cycle procedure (do not forget the router)?

Power off the Wi-Fi router, the printer, the iPhone, any iPads and Macs, and all other computers/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 iPhone. Power on any iPads and Macs. Finally, power on all other computers/devices.

AirPrint works with wireless (Wi-Fi) or wired (Ethernet) network connections. An AirPrint printer (such as the Brother MFC-L2705DW) that has Ethernet could be wired to one of the LAN ports of the Wi-Fi router instead of using a wireless connection, if you so wish just for a comparative test. With the printer wired by Ethernet, some of the problems related to Wi-Fi may be avoided. The iPhone would of course connect wirelessly to the router.

You may also want to have a look at the following tip by Lawrence Finch:

AirPrint Troubleshooting - Apple Community

Thank you for the information. Normally, it ought to be possible to print from an iPhone via AirPrint without a special app, but that may require updated printer firmware. Anyway, glad to hear that the iPrint&Scan app worked.