Go ahead and grab that eraser, because we have a new launch date for the HTC One S at T-Mobile. That's right, a leaked training slide has now outed Wednesday, April 25th as the day to watch for the arrival of this unibody beauty. Just make sure to mark your calendar with pencil -- as with all rumored product announcements, this date might shift again. On the plus side, you now know as much as T-Mobile employees, and that's a nice feeling.