Skypein/out as adequate calling substitute

[willrich354]

I'm not too good with voip calling solutions. I'm going to get the Sprint Tab with a 2GB plan. Is Skypein/out with an Online Number an adequate substitute for a calling plan? I also need to know with Skype in/out if the app closes when you pick up a call where I have to reopen Skype to be able to get calls.