HTC has been doing a fair bit of teasing ahead of the March 25th announcement event for the HTC One (M8). We've been seeing those teasers in video form, however yesterday there was also a bit about the livestream. Yes, HTC will be live streaming the announcement. We haven't heard much from the carriers just yet, but it looks like AT&T is beginning to make it known they will be offering the device.
Coming by way of a recently updated "Share the Secret" page on the AT&T website, the carrier has made it known they are "about to launch an amazing new HTC device." They haven't offered anything more specific here, nonetheless, it seems to go without saying -- they are talking about the next-generation of the HTC One.
AT&T is doing the teasing to promote a giveaway they will be holding. Details coming from that page mention how they will be giving away one device per day beginning on March 21. That of course, nicely ties in with the announcement date of March 25th. If nothing else, this does suggest AT&T will be amongst the carriers planning to offer the HTC One (M8) immediately after the announcement.
We are still in need of an official confirmation on that last bit, however an earlier leak tipped a similar arrangement with Verizon Wireless. The Big Red leak came in image form and brought mention of how users should be prepared to hit the refresh button at 1PM EST on March 25th. That also coincides with news from Carphone Warehouse in regards to the UK launch of the One (M8).