T-Mobile is no stranger to making big moves in order to attract new sign-ups. That's been its MO for the last few years as it slowly leaches subscribers away from the other carriers. Tmo's service hasn't been as good of a deal lately, but there's a very intriguing promotion starting March 1st. T-Mobile will give most subscribers a free line.

This deal is available to most new and existing customers. Anyone on ONE or Simple Choice plans can get the free line, provided there are two or more lines already. For capped simple choice plans, the bonus line will have the same amount of monthly data as your voice lines. If they have different amounts, it will match the lower of the two. The extra line can be for a smartphone, tablet, wearable, or even an in-car hotspot. T-Mobile is obviously hoping you'll buy a new device for the bonus line, but it doesn't sound like you are required to.

As with many of these "free" line promotions, this is free after a bill credit. However, T-Mobile says you should see that on the first bill. If not, the second bill will have two credits to make up for it. While the promotion starts on March 1st, we don't know how long it'll be available. You can keep the free line for as long as you want, provided you keep the eligible lines active.

PRESS RELEASE

Source: T-Mobile