Virtual numbers for calls and SMS are numbers that can be used for incoming and outgoing calls, as well as incoming and outgoing SMS.
You can send outgoing SMS only if you have a number with SMS feature. You can send them from your account at Freezvon in "Virtual Phone numbers --> Send SMS", to any international destination except for the ones that are disallowed by local operators.
You can check whether this number accepts international incoming calls/SMS in the following articles: