skypi is a common mispronunciation for “Skype” (rhymes with “type” and “ripe”), a very popular VoIP client.
Popular services that Skype offers:
Skype Credit allows you to:
- Call landline and mobile phones anywhere in the world (NOTE: Emergency numbers are not available).
- Send SMS messages to mobile phones.
You can buy Skype Credit.
Read about how to set up Skype here if you don’t already have it. (Skype is a free download).