According to the latest rumors coming from China, Xiaomi Mi7 will be officially announced in February 2018 with the best technologies available on the market. It is the same month in which Mobile World Congress 2018 will take place in Barcelona, so the company may take part to the event (even if this did not happen with the launch of the Mi6). Unluckily the launch date is the only thing that rumors are suggesting at this moment. For other info, we have to rely on previous voices. According to these, the phone will sport the next flagship processor by Qualcomm: the Snapdragon 845.
It seems that it will not be the standard version of the Snapdragon 845, but a special version that you will only see on Xiaomi Mi7. Indeed, the company is working with Qualcomm to optimize the SoC especially for this device, and the experimentation of the phone is expected to start in November. From what rumors suggested, the device will sport an OLED display (like the one on Mi Note 2) with an 18:9 aspect ratio, provided either by Samsung or LG. Due to a high screen to body ratio we do not expect to see a physical Home key integrating a fingerprint reading on the front panel.
And we do not even expect to see on Xiaomi Mi7 a fingerprint reader embedded in the display, even if Qualcomm and Vivo have recently announced this technology. Qualcomm Snapdragon 845 will be a very powerful SoC and it should be manufactured with a 10 nm process. It should support download speeds up to 1.2 Gbps. The chipset should be paired with 6 or 8 GB of RAM depending on the variant that you will choose to buy. The Mi7 should also have a wireless charging technology made possible thanks to a back cover made of ceramic (since full metal unibody designs can not support wireless charging).