T-Mobile is currently running a promotion that lets you get an Apple Watch Series 3 at 50% off after buying one at full price. This discount will save you $200 off of a 38mm Apple Watch and $215 off of a 42mm. Though not the best deal we’ve tracked historically, it’s currently the lowest available for an Apple Watch. Your discount will come in the form of 24 monthly bill credits and you must activate qualifying service to be eligible for the discount.