High-quality and low-cost international calls. VoIP (SIP) service with Opus voice codec quality.
Callback - occurs when the originator of a call is immediately called back in a second call as a response.
Callback that is invoked by SMS. It works without Internet connection or slow connection.
Callbacker uses Opus voice codec, which is used in Skype and therefore Callbacker crystal clear sound!
Receiving free incoming calls when your Callbacker turned off throught the Push-notifications system.
Callbacker has an unique selection call method technology depending on the type and quality of communication.
You can turn on call recording button during a call. Recorded files can be sent to your email at the end of the call.
Invite your friends and earn money with them money and money of their friends. Up to 5 levels.
We try to make the cost of calls as low as possible.
Like many programs for communication Callbacker also has the ability to send not only free messages, but SMS also.
If you have no connection to the Internet, Callbacker can make a call using the SMS-call.
During a call, you can turn on voice change function for called parity did not recognize you. So you can make funny for your friends.