I don't find the XDJ-AERO on the mobile device's SSID selection screen.

-The XDJ-AERO may not be set to the access point mode. Set it to the access point mode.
-When using this unit in the access point mode, try moving the mobile device closer to this unit.
-If there is another wireless LAN router, a microwave oven, wireless mouse, wireless headphones, cordless telephone, etc., (a device using the same 2.4 GHz frequency band) in the room, try moving this unit and the mobile device away from such devices.
-If large amounts of data are being transferred by wireless connection nearby (for example for high picture quality net video playback), try stopping data transfer.