LG V30 buy one get $500 off a 2nd or a free V20 or G6 at T-Mobile

Buy an LG V30 at T-Mobile and get $500 off a 2nd or a free V20 or G6. Starts 10/13. LG started advertising the deal on this page:
http://www.lg.com/us/mobile-phone…n/t-mobile