I think it's the usual MIFI or other cellular to wifi thing but those have the same issues here.
I had a wireless connection for a few months now. It can use both 3G and Wi-Fi, but I am using 3G right now. However, it is really bad and drops all the time. I use it for a mobile device.
I was now thinking of buying a Wi-Fi modem too and of using it for both my mobile device and my laptop (I normally use ADSL2+ for my laptop).
I know this question is pretty simple, but I never had Wi-Fi before.... So after I buy the Wi-Fi modem, what do I do? Just connect it to my laptop and mobile device, or do I have to set it up in one of the two?