T-Mobile is offering $300 off an iPhone X if you trade in your current iPhone

All the major US carriers are announcing their iPhone X deals, and now T-Mobile is joining the party with an offer that’s pretty similar to what Verizon and Sprint have on tap: trade in your current “qualifying” iPhone, and T-Mobile will give you up to $300 off your iPhone X.Like Verizon, you’ll have to purchase the iPhone on one of T-Mobile’s installment plans (either the regular “Equipment Installment Plan” or the company’s Jump! On Demand leasin