Nokia is expected to introduced the Lumia 820 and 920 at the event. The 820 is a mid- to high-end phone, while the 920 will be its top-of-the-line device.
On Monday, images (via a new Twitter account at @evleaks) and details on the devices leaked. Here's what we expect on Wednesday.
Lumia 820: Both will come with wireless charging capability, although only the 920 will come with it standard; 820 owners will have to buy a special cover. Owners will also be able to change the rear covers of the device and, like the 710, consumers will be able to purchase additional colors for the device.
The 820 will come with a relatively modest (nowadays) 8GB of internal storage, but the device will support storage expansion via a microSD slot. It will come with a 1.5GHz dual-core processor and 1GB of RAM, along with a 4.3-inch screen.
The camera setup is expected to be similar to that of the 920, but it's unclear if Nokia will brand it as PureView (see below).
It will support the Qi wireless power standard, which will make it compatible with other wireless charging products from other manufacturers. Verizon, for example, offers Qi wireless charging on a number of its smartphones.
It's rumored that the Lumia 920 will have a PureView camera, sort of. Lumia will brand the Lumia 920 camera as a PureView camera, but the camera will only be an 8MP camera, vs. the 41MP one found on the company's 808 PureView handset. Nokia will tout advancements in image stabilization and camera software in order to brand the camera that it plans to ship on the device as PureView. The front-facing camera will be a 1.3-megapixel model.
We're expecting Nokia to announce both devices on Wednesday, with AT&T customers probably seeing them first, and a launch date expected in late October or early November.
However, with the iPhone 5 expected to launch to retail on Sept. 21, and an iPad mini expected in October, these retail launches could see their excitement tempered.