在歐洲用iphone4打電話和上網一問?

Q1) Do you mean your hk mirco sim card 漫游？

Q2) I would recommand you buy a local pay as you go sim and top up value as you want, it should be the cheapest way to contact your local and make overseas calls
I m not sure where are you going to since Europe is big, eg. uk has lyca mobile they charge 1p for making hk overseas calls

Q3) wifi can be chargable. please ensure with the network provider. Generally wi-fi can provide free internet service

你可以參考以下網址

www.ComingZOO.com
www.PF23.com

我自己都去開, 希望可以幫到你~ ^T^