"This is THE BEST voicemail program I have ever had," gushed "Roger Hastings." "Loaded with features."

According to YouMail, which estimates it has more than two million users of its apps, the company is trying to rework traditional telecom functions and add value to them.

That can sometimes irk old line providers of those services. For instance, T-Mobile, which provides a visual voice mail service similar to YouMail's, had YouMail's apps from the Android Market for disrupting its network.

The problem was eventually solved and YouMail's apps were reinstated in the market.

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