Home Smartphones T-Mobile Columbus Day Sale: up to $300 off iPhone XS or XS... Smartphones T-Mobile Columbus Day Sale: up to $300 off iPhone XS or XS Max, 50% off for Military Familities By ARCOM - 5 October 2018 149 0 SHARE Facebook Twitter Go to the deal page: T-Mobile Columbus Day Sale: up to $300 off iPhone XS or XS Max, 50% off for Military Familities