Exactly a month after taking down the service in April, T-Mobile's Bobsled VOIP Facebook calling will return with a new look this week to distinguish it more clearly from any Facebook communications option, the company announced. Facebook had originally requested that the company change the look of the application, fearing it would confuse users by resembling too closely an official Facebook service. The service, which will also work on T-Mobile Android phones, allows Facebook users to call each other by their contact names, even if the recipient does not have the ap