To add to my bride's answer:

While she was in Switzerland, I had T-Mobile. I had better service over there than I did at home.
I can comment on M'ellen's remark: I get VERY poor service in my home.

BUT over there... including FP, it worked wonderfully. I had 4 bars in St Petersburg!

But, do understand that when you are out at sea, service will be weak.

Enjoy the PG! (I know that you will).
Franco is the best!

Doug