when you say mobile brroadband, you men 3g or wimax right? They don't have anything to do with wireless local area network (WLAN or wifi). Your printer seems to have wifi so you can use it wirelessly. Do you have a wireless router? If not you will have to connect it ad-hoc, although it doesn't make sense to connect printer wirelessly without sharing it in a network.
I think this should be in the wireless forum, you will get more help on connecting the printer wirelessly. I will request move this to the wireless forum.