Hello,
I am planning a 3 week trip to Greece with my family and some friends. I have an AT&T iPhone on a family share plan. After talking to AT&T it sounds like I can buy a travel plan, which I plan to do. Here is my question:

I want to restrict call access from work. In other words, I don't want to receive CALLS from work. Nor do I want to receive calls from customers they may (and likely will) give my number to (and no, asking won't work). I am planning on checking and responding to emails via a wifi connected iPad. The kicker is that I want to be able communicate with my family while there for emergencies, etc. They also have iPhones.

Any options for turning cellular off and gaining call function via an app? If not, what are my options for achieving the aforementioned goal? I don't have a JB phone, but I'm not opposed to it if there is a cydia solution.

Thanks for the help!