Update: We could see the HTC One A9 on October 20, but recent leaks suggest it could be mid-range and iPhone-inspired.
We've already had one HTC flagship this year in the form of the HTC One M9, but we might be about to get another. Not the HTC One M10 - that probably won't be here until early next year - but instead something new and different.
There are conflicting rumors about just how high-end it will actually be, but it looks pretty likely that it will be called the HTC One A9, given that it's referred to as such in certification documents (though the name HTC Aero was previously being thrown around).
With the possibility of a QHD screen and a ground-breaking camera it should be well worth keeping an eye on, though there's a chance it could sport more modest specs.
Cut to the chase
What is it? A new mid-range or high-end phone from HTC.
When is it out? October probably.
What will it cost? That depends on how high-end it ends up being.
HTC One A9 release date
We could see the HTC One A9 very soon, as HTC has sent out invites for an online event on October 20. The A9 isn't named in the invitation, but the company does confirm that it's using the event to announce a new phone, so it's likely to be that.
It looks like the HTC One A9 could be taking its design cues from the iPhone 6S based on some leaked photos, showing large top and bottom bezels and a metal edge.
Some leaked renders supposedly showing the back of the phone are even more iPhone-inspired. They show a likely metallic handset in six different colors, with antenna lines running along the back in a very familiar position.
A leaked shot of the HTC One A9 seemingly reveals a 5.0-inch Full HD AMOLED display. That would be a match in resolution for the HTC One M9 and has been echoed by another leak, but then again the HTC One A9 could push things up to QHD.
A source speaking to HTCViet certainly thinks so anyway, claiming that the upcoming handset will have a 1440 x 2560 display, protected by Gorilla Glass 4.
Supposedly it will also be 2.5D, which is less exciting than it probably sounds, but means that the edges will curve ever so slightly into the frame, much like they do on the iPhone 6.
HTC One A9 rivals
It's hard to truly get a sense of what sort of phone the HTC One A9 will be yet, so predicting its rivals is tricky too. But as a possibly high-end late 2015 handset it could have the iPhone 6S and iPhone 6S Plus for company.
The Sony Xperia Z5 has launched too, once again bringing the best of Sony in a smartphone, including waterproofing, a 5.2-inch 1080p screen and a fingerprint scanner.
The A9 could potentially also face competition from other HTC handsets, most notably the still-decent HTC One M9, depending on the price.
If on the other hand it's more mid-range we could see it face the impressively affordable Moto G (2015) or the rumored OnePlus Mini.
They go some way to explaining why, stating that it will have an f/1.9 aperture, which could improve photos in low light conditions. That's something HTC is often good at anyway, but there's always room for improvement.
As well as that it will apparently be able to save photos in RAW format, so if you're serious about photography you won't have to compress the images you capture. We're not convinced any of that really sounds ground-breaking, but it is at least promising.
HTC One A9 OS and power
A benchmark has appeared showing the HTC One A9 as having just a Snapdragon 620 processor, albeit with a meaty 3GB of RAM and 32GB of storage.
That's a similar spec to a leaked image supposedly showing the HTC One A9, which pointed to a 1.5GHz octa-core Snapdragon 617 processor, 2GB of RAM and 16GB of storage, which would make for a mid-range configuration.
Then again, another benchmark has popped up showing a handset believed to be the HTC One A9 as rocking a 1.96GHz deca-core MediaTek Helio X20 SoC and 4GB of RAM, which really would make it tremendously powerful. So we're seeing several different rumors.
As for the OS, it looks very likely that it will run Android Marshmallow out of the box, as not only do some leaks point to that but HTC's own event invite mentions 'the new Marshmallow from HTC'.
HTC One A9 cost
There haven't been any leaks or rumors about the price of the HTC One A9, but if it end up being a high-end phone as some leaks suggest we'd expect a high-end price.
For reference the HTC One M9 has an RRP of £500/$649/AU$1099, and we doubt the A9 will be any more than that and it could be less as it's not part of HTC's main flagship line, especially if the more modest spec rumors pan out - but it's bound to cost at least a few hundred pounds/dollars.