Concerning the question of what Hughes and Roy are saying...
Hughes: Moshi moshi! Oi! Oi, Roi! Kitte kure...omou wa na... Tonikaku, aikawarazu Erishia-chan kawaiindesu!
Roy: Urusai!
Hughes: *background* Ee...? (I can see him making a ";o;" face here...)
Roy: Denwa o shirotsuke suru na!
Hughes: Sore no koto iundatteba!
Ed: Gyaaaaa~
Translation:
Hughes: Hello, hello? Hey! Hey, Roy! Listen to this...I was thinking... Anyways, as usually, Alicia-chan is adorable!
Roy: Shut up!
Hughes: Why...? [;o;]
Roy: Don't be so attached to the phone!
Hughes: [some type of whining phrase, like "aww" or "geeze"], saying (or "calling it," concerning Roy referring to his phone habits) something like that! (in other words, he's basically whining about the fact that Roy was getting on to him for calling)
Ed: Gyaaaaa~ (I don't think I need to translate...)
And, yeah...at the end Ed is saying "Don't call me short"...