i have a mobile internet / wi fi query

Hello there just become a member and posting my first post. If anyone can help me with the following that would be great.
Basically I've got a old power book G4 and I Mac 2.66 GHz version 10.6.8. I want to get them both online using a mobile internet package from three which I think is the best option at present in the uk ( if anyone knows a better one I'd like to no please ).

I have the choice of Huawei premium dongle or the Huawei mi fi wireless option. I think i prefer the mi fi so i can have my G4 and I Mac working and add other things later and i believe you can move it around easier to get better reception if needed ?

I think my imac should have wireless ? ( I'm sure I've had this working in the air port on my old BT internet ? ) is air port ? another word for wireless ?

last question i believe i can get a mini usb dongle for around £10.00 which would make my g4 wireless and hopefully pick ufp the mi fi connection as well as my I Mac. Can anyone sujjest a good make that would work on my G4 ?

thanks for your time and all help is appreciated
kind regards
Ray

Can anyone please help me with the above question ? i would be really appreciated if you can
regards
Ray

Hello there. Yes it's called Airport on a Mac. I would make sure that you do a software update on both machines to get them optimised before doing it.

I've never had mobile internet but have seen it in action so what you describe looks ok.