• We have developed this app for outgoing and incoming using SIP.
  • Subscribers register with mobile number.
  • User will immediately get rate display on top of the app.
  • HD calling facility for the UK region.
  • My account to display user profile page.
  • SIP ID, Password and rest of the provision is automatically handled on mobile app.
  • Contact/Phone book synchronization to display who else is using OTTO app iOS: We developed iOS App for this client and currently under testing phase.

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