Do you want to control the mixer with an app on your phone? The only Allen Heath app for Android is the QU You monitor mix app.
I know the third party Mix Station app is available for Android devices but I have never used it.
If your looking for remote wireless control of your mixer you will need to connect it to a WIFI router or access point.
The mixer can be set to either DHCP or set up with a static IP address. Most of your WIFI routers will hand out a DHCP IP address, if you direct connect to most access points you will need to set the mixer up with a static IP in the range that the access point is operating in.
You control device does not need to be operating in hot spot mode but rather set up to connect to the WIFI network that the mixer is connected to.