We all know that carriers offer BOGO deals on new devices often. But what you don't see too much is a BOGO deal on a wireless plan. According to a verified T-Mobile employee posting on Reddit (via TmoNews), T-Mobile has a deal on data lines; add a tablet, a smartwatch line, a DIGITS line (a second phone number for your T-Mobile device) or one for SyncUp Drive (which monitors your car's health and turns it into a real mobile Wi-Fi hotspot) and get a second line for free via monthly bill credits.
While you don't need to buy a device to take advantage of this limited time offer, there are some caveats. You cannot cancel a line you already have in order to take advantage of this deal, and if you happened to cancel a data line within 90 days of the start of the promotion (which was on August 30th) you are not allowed to participate in the BOGO deal unless you reactivate that line. Once you agree to get the second data line for free, you cannot drop any type of line on your T-Mobile account for 365 days.
T-Mobile will pay out up to $25 a month in bill credits and those taking T-Mobile up on the offer can mix and match from among eligible plans. If you own a smartwatch and a tablet that will connect to a 4G LTE network, now would be a great time to take them off Wi-Fi and truly embrace their mobility by signing up for one data plan and getting a second for free. Keep in mind that this is a limited-time offer.