Good news for those of you interested in T-Mobile's upcoming Magenta Deal Days promotion that we first got wind of last weekend, as more details of the sale have surfaced. Some documents sent to our pals at TmoNews have confirmed that the promo is open to new activations as well as upgrades, individual and family plans and add-a-lines. Classic plan customers looking to upgrade and take advantage of the deal must have finished 22 or more months upgrade tenure. Another doc mentions that any Value, Classic or legacy/grandfathered annual contract plan qualifies for the deal. Interested customers will need to sign up to renew their contract for two years or activate a new contract with a voice plan and a qualifying 2GB or higher data plan or mobile broadband offering.

These newly-leaked docs have also revealed some more devices that are eligible for this latest round of Magenta Deal Days. According to the images, the HTC One S, Nokia Lumia 710 and HTC Radar 4G will be a part of the promo. Those handsets join the T-Mobile myTouch, T-Mobile myTouch Q, HTC Amaze 4G, Samsung Galaxy S II, Samsung Galaxy S Blaze 4G and Samsung Exhibit II 4G in the Magenta Deal Days promo.

The initial leak from this past weekend didn't include the HTC One S on its list of devices that will be eligible for this promo, so it's good to see one of HTC's latest handsets included. We're still waiting for T-Mobile to make this Magenta Deal Days sale officially official, but with a purported start date of May 18th, it shouldn't be much longer before we hear something. Any of you thinking about taking advantage of this promo once it kicks off later this week?

Via TmoNews