Connect to own hotspot

Hi,

You do not say which exact printer make and model it is.

Do you want to print from the iPhone or from another device/computer?

Generally speaking, if a printer is listed in About AirPrint - Apple Support as a model supporting the driverless AirPrint technology, it can be used without an additional app, provided that the iPhone and the printer are connected to the same network. Usually, this is your home or office Wi-Fi network provided by a Wi-Fi router.

The iPhone personal hotspot is not a normal router, and is not intended for local networking.

A dedicated mobile broadband router (sometimes also called a personal/portable hotspot) should have the ability to handle local Wi-Fi networking.

If there is no existing Wi-Fi network (router) where you want to print from the iPhone (or iPad/Mac) to an AirPrint printer, almost any Wi-Fi router could be used. You may have an old/spare router already. The interesting part is the local (WLAN/LAN) side. The WAN (Internet) side does not have to be connected. You would simply set up a private Wi-Fi network for printing purposes only.

There are also travel routers without mobile broadband (similar to the example at https://www.tp-link.com/us/home-networking/wifi-router/tl-wr902ac/).