Well yes, but it's best if you know
who it is you are calling! The temptation to make random calls across the
globe must be high especially if you aren't paying for the call but try
and resist. Ok, I know you wouldn't but
plenty of people do, generally spammers, so be aware that when you log in
to skype for instance you may well get people you've never heard of before
trying to contact you. First off don't answer and secondly restrict who
can contact you (dealt with in the Skype section)
Getting back to the original question, yes you
can ring anyone in the world regardless of service but remember for free
calls both parties must be using the same VoIP service, ie Skype, Gizmo
etc.
It's worth remembering though that VoIP can save
you money even if the call is local - if you are currently paying for
local calls (most landline providers still charge during weekdays) then
VoIP can save you money.
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