Cell phones and landlines

Hello everyone,

You will be able to tell I am a newbee! So now those who gave me advice satellite etc, please give me your advice on Landline and mobile. I already have a VIOP phone operator in London so I need a number and two French mobiles although it looks like I will be travelling internationally. I have a UK Iphone and so does my fiancee Julia. Orange seems to be the best although I understand they are just another brand fro France Telecom?