Keep your UK mobile phone but do not use it in France except to listen you your answer phone. Unless of course you turn your UK answer phone off and leave a message giving advice about what your caller should do.
Buy a French SIM card payg and install. Use only for local French Calls (Why payg? You do not need a French bank account. If you have a French bank account consider a cheap student contract. You will need an account if you have an internet connection. Use France Telecom not Alice.)
For your friends to contact you cheaply buy a SkypeIn UK number and have it redirected to a French landline - you will probably need a landline for your computer connection. In a hall of residence with WiFi provided I would suggest you redirect to or they use your Skype address. Add Pamela to Skype to give you an on line answer machine. Or pay for it to be redirected to your French mobile - about 0.2 Euros per min. Or do both and be ruthless about call screening on your mobile which will make it go to Pamela for you to answer later. Skype allows you to redirect simultaneously to more than one phone.
Use SkypeOut to ring UK land lines for free with a subscription or pay at the rate above to ring their mobiles.
Become an addict to
www.saynoto0870.com for finding geographical numbers to ring rather than expensive ones.
We are retired old folk who wander Europe to the great confusion of our family and friends. This structure is the cheapest and easiest for them to keep in touch.
Good luck
You could use
addacumen@gmail.com to contact me
Tony Davis