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Grandstream Networks announces Wave, a free Video VoIP app for SIP-based calling
Otoku call is a convenient call application available prefix number is automatically granted.
Enjoy free wifi phone calls with your friends and family abroad.
KDDI Corporation provides is the only app of "au office number" and "office mobile pack (fixed telephone number notification options)".
Rogers Unison - get the best features of your desk phone on your mobile device
"Biz dial" is provided by SOFTBANK CORP., Is a service that can receive calls at a fixed telephone number of the office from the smartphone.