NetTalk Sucks
I purchased a NetTalk Duo (VOIP) device and had problems with it, interfered with my WiFi signal and kept losing, so I sent a problem ticket to them. Here is there response:
Maybe by changing some settings in your modem will help resolve this issue.
“Maybe” really inspires confidence and the detailed information on what setting I need to adjust really helped. Could you not finder a cheaper help center in India? 
