T-Mobile's back with a sweet deal for its loyal customers: a free line! If you're a T-Mobile postpaid customer with at least two lines, you might be eligible to add another line completely free (you'll just need to cover the $35 activation fee). This is a fantastic way to save money on your monthly bill, especially if you have a family or are looking to add a line for a new device. To claim your free line, you'll need to reach out to T-Force on Twitter or Facebook and mention the promo code "2023 Free Line On Us P6". Keep in mind that this offer seems to be targeted towards long-term T-Mobile customers (at least 12 months of service) who were originally T-Mobile customers and not Sprint customers that have been migrated over. This promo works for Simple Choice Plans, Magenta Max, and T-Mobile One plans. So, if you meet the criteria, don't miss out on this opportunity to lower your phone bill!