We've already extensively covered on everything from to , but surprise, surprise, the company appears to have quietly kicked off a holiday promotion on the mid-range handset as well.This one has no expiration date listed, with the world's largest smartphone vendor merely advertising it as a "limited time offer" running "while supplies last" on the company's official US website. Normally priced at $349.99, the sleek 6.4-inch A50 can be purchased for only $274.99 at the time of this writing either in a single upfront payment or 24 monthly installments of $11.46 a pop.