Already, OnePlus has indicated that the phone could be powered by the latest Qualcomm Snapdragon 821 processor which has been seen in phones like the Google Pixel. In fact, this time around, the phone could use a faster version of the same processor which Xiaomi is already using in the Mi Mix smartphone. But the crazy bit is that it may have 8GB RAM as this Verge Circuit Breaker report suggests.
8GB RAM is insane amount of fire power and it could go under-utilised and could in turn be a power hog. On the OnePlus 3, we saw 6GB RAM and now this would be a crazy amount which we normally see on PCs and Macs. As I have already seen in the Google Pixel 4GB RAM is ample for buttery smooth performance, so the doubled amount of RAM on the OnePlus 3T could be overkill.
OnePlus is also said to augment the battery and bump it up to a 3,500 or 4,000mAh power pack coupled with the fantastic dash charger. The company is said to be having issues with sourcing enough AMOLED panels for the same, and there is a rumour that the phone could revert back to a full HD LCD screen. But considering that would be a backward step I wouldn’t give much weight to that rumour.
The phone is likely to be upgraded to Android 7.0 Nougat running in concert with OnePlus Oxygen OS, perhaps a new build of the same.
In the imaging department not much is known as of now, but one should expect a bare minimum of the Sony IMX 298 16-megapixel sensor which was on the OnePlus 3 coupled with optical stabilisation. On the front, the phone could have a 8-megapixel shooter. Expect an aluminium chassis similar if not the same as the one on the OnePlus 3.