Remember the T-Mobile Sidekick and all those cool people that had one? Well T-Mobile released another one last year called the Sidekick 4G that surely almost no one bought. While I still have a special love for the Sidekick, in this day and age of smartphones it's a dying breed. Sadly we have now learned the latest model, the Sidekick 4G has been retired by T-Mobile and is no more.