I am going to London and Paris. My husband and I would both like to have an unlocked cell phone, obviously with a Sim Card that will work in both places. I can barely wrap my head around how this works but have read lots of stuff and think I am getting it. Can anyone give me exact advice as to what worked for you most recently? What type of phone? Where did you buy it? Did you have to buy a separate Sim Card? We don't want to pay a lot...just want the opportunity to be in contact with each other, if needed. Thanks.