So I used the tmobile for texting the US, emails and browsing and waze while in Israel and it worked very well for the most part.
I had a Golan card that I used for calls, since I didnt want to pay .20 min for calls. Also, if you are trying to talk to Israelis they may not have a way to call a US phone number.
Is it possible to use the data access on the phone for calls also? Is there a good app that would allow free or cheap calls? Incoming and outgoing?