With something as important as your phones does it make sense to rely on a single carrier? All carriers experience outages and quality issues. If you only have one carrier then you suffer when they suffer. All carriers have different rates for different parts of the country and world. If you only have one carrier then you pay their rates and can't take advantage of lower costs in the market.
The concept behind the MetroSwitch is quite simple. Don’t rely on a single carrier. Instead, utilize all the carriers and send every call to the most direct, highest quality and least cost carrier. In doing so, costs are greatly reduced while performance, reliability and accountability are substantially enhanced.