Hello. Here's my scenario: I have the opportunity to work from home but I need a phone line for the many conference calls I need to attend. Since I only have an iPhone (AT&T) and getting my company to expense the cost of a phone line (either land or mobile) would be more trouble then it's worth, I'm interested in a simple AND cheap VoIP service. I don't require chat, text, video calls or access over 3G, all I need is the ability to call US phone numbers via my iPhone and home WiFi connection. Here's my question: Maybe it's my searching technique but I've failed to find a clear and concise answer to my primary question; which VoIP service is best for making US calls from my iPhone 4S (via home WiFi) and is relatively cheap ($30 a year or so)? I'm familiar with Skype and Google Voice but I'm interested in any services I may have overlooked. Again, I'm not interested in chat, text, video calls or 3G access. In fact, I'm not concerned with having an actual phone number either because my work phone can be forwarded to my iPhone for voice mail retrieval and what not. Thanks.