$79.99 up-front for new customers, $99.99 for upgrades, on Sprint and AT&T

Amazon sends word that tomorrow (Friday, June 14) it'll be holding a one-day sale on the Sprint and AT&T HTC One. On either network you'll pay a reduced price of $79.99 if you're a new customer, or $99.99 if you're upgrading -- either being a significant saving over the standard up-front cost for HTC's latest.

If you're interested, keep an eye on the links below over the next day or so --