Sayo provides free calls & free messages between sayo's users all over the world and international cheap calls to non-sayo numbers worldwide.
- free calling,
- free texting (chat),
- sending attachments: short videos, audios, pictures,
- voice and HD quality video calling,
- call transfer- connect your conversations partner with other number or Sayo contact,
- call waiting - two separate conversations at the same time,
- voicemail as mp3 to email delivery.