The HTC One is one of the most anticipated handsets of 2013, and it now seems the smartphone will launch on T-Mobile April 24.

The HTC One is the company's new flagship smartphone, and it sports some exciting specs and features that make it worthy of the title. In terms of exact launch dates, however, things are still a bit hazy.

Best Buy previously pegged the T-Mobile HTC One launch for April 19, but it now seems that will take a few days longer. According to a leaked T-Mobile internal memo, the carrier's version of the HTC One will make its debut April 24, coming to "select retail and branded locations." The smartphone will reportedly become available via telesales on the same date.

As T-Mobile recently switched to "UNcarrier" plans, it will have the HTC One available for a $99 down payment plus an additional $20 a month for two years. Retail pricing outside T-Mobile, meanwhile, lists the 32GB model with a $249.99 price tag. In other words, that would be the price for the HTC One on a two-year contract, as other retailers such as Best Buy will not be offering the new T-Mobile UNcarrier plans at first.

While the April 24 leaked launch date is not 100 percent certain, the HTC One is bound to hit T-Mobile soon enough, and it seems like the carrier is preparing to launch the handset with plenty of bells and whistles. The memo claims T-Mobile has specific in-store device placement and price cards, and it will have its employees wearing special HTC shirts. Potential buyers who check out one of T-Mobile's stores between April 24 and 28 will get to see those shirts heralding the arrival of the HTC One.

It all seems planned and ready to go; the only thing missing now is an official confirmation from T-Mobile and, of course, the actual launch of the new HTC One flagship. Keep in mind that those interested in T-Mobile's new UNcarrier plans have to shop directly with T-Mobile. Stay tuned for more details as they emerge.