Can I replace my mobile phone calling plan with Skype and unlimited data plan?

[any ANONYMOUS forum user]

I'm thinking about Skype subscription plan for US and Canada is really cheap.

I know there are Skype apps for 3G phones (Nokia, Windows Mobile, Android,...). Can I get an unlimited data plan and then use Skype to make phone calls? Will I save any money with it?

I believe Skype actually uses 3G internet connection to make phone calls, so I don't really need a phone service.

Skype needs Wi-Fi or 3G Internet access. If you have it, you can make calls. You don't need a calling plan to use Skype, you can use a data plan for it.

So you can replace your calling plan with Skype. But make sure you know the rates for calling the U.S. and Canada.

Also I recommend to take a look at SIP providers. For example, search for betamax and compare their prices. Usually they are much better than Skype rates, and some countries can even be free.