Hello, while I have used Skype via my Smartphone locally in the USA, I have had problems with connecting and meeting the time requested appointments (over to Russia), thus far. There seems to be a piece of details missing. When the time request is set up, how is any notice given just prior to the connection? So far, not too many persons seem to know how to proceed. I am wanting to learn more Russian language.
I highly recommend using "Line" app, instead...
For various reasons, VoIP services such as Skype don't work in all countries or through all ISPs. The list of affected countries and the features that don't work is long and changes constantly. Even here in the EU there's some controversy over Skype having to do with encrypted communications.
The only solution is to use Skype over VPN, or to use another VoIP platform.
ETA sorry, the original post was changed and this response isn't what you're asking about.