T-Mobile offers a second line for free when you activate a phone line

T-Mobile recently launched a new offer for its customers, which lets them add a second line for free when they activate a phone line. The BOGO (buy one, get one) deal comes with a handful of requirements, which aren't that hard to meet if you really want to take advantage of the offer.

First off, T-Mobile customers with at least 2 qualifying voice lines on a qualifying T-Mobile ONE, T-Mobile One Plus Family, or Simple Choice plan can add a paid voice line and get an additional voice line for free, after monthly bill credits.

As such, the free line will be redeemed via bill credits ...