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Calls, SMS & Communication Features
VoIP and GSM: how your Onoff calls work
Onoff Calls: receive your calls over the mobile network
Gateway numbers
Make and receive calls from the web app
Transfer a call
Greeting (IVR): set up how your calls are answered
Call short and special numbers
Included usage and credits
Send a message from the web app
MMS
Receive SMS from special services
Delete a call or message