I want to create an application used to make voice calls and video calls, but I don’t know if this service will be free? and I'm from Egypt Any lesson would be appreciated, Thanks in Advance.
You must use QuickBlox, which is good for audio and video.
http://quickblox.com/developers/Sample-webrtc-android
Why don't you try oovoo sdk? Everything you need is customized to your requirements.
https://developers.oovoo.com/
There is also a tutorial for using this sdk.
https://developers.oovoo.com/docs
An alternative solution, a complete SDK and API for voice and video calls. Go to the link page
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