Phone Power: This VoIP service requires a minimum Internet speed of 768 Kbps download and 128 Kbps upload. Phone.com: The minimum Internet speed requirement for Phone.com is 2.5 Mbps download. Phone.com doesn’t have a requirement for upload speed because the upload speed that automatically comes with the download speed will work fine with the service. Via:Talk: This VoIP service requires a minimum speed of 128 Kbps download and 128 Kbps upload. AXVoice: The minimum Internet speed requirement for AXVoice is 128 Kbps download and 128 Kbps upload. Voip.com: This VoIp service requires a minimum speed of 128 KPS upload and 728 download. Lingo: The minimum Internet speed requirement for Lingo is 2 Mbps download. Lingo doesn’t have a requirement for upload speed because the upload speed that automatically comes with the download speed will work fine with the service. Skype: This VoIP service requires a minimum speed of 512