Samsung's upcoming flagship, the Galaxy S10, is also expected to have one - though it's believed to be a more secure setup that uses ultrasonic scanning for a 3D map of your fingerprint.
OnePlus pointed out that users unlock their devices "multiple times" during the course of the day.
A few phones have in display fingerprint readers and Vivo was the noisiest of most of the phones with this feature followed by a single design with Xiaomi MI8 explorer edition and the Porsche design Huawei mate RS. However, the technology is not super efficient, and often you have to put your finger on the screen at a certain angle and apply a certain amount of pressure to unlock it.
Apart from in-display fingerprint sensor technology, the OnePlus 6T is also expected to feature a new format screen with a tiny notch on top.
But the truth is, if you really want to know what's in the next OnePlus phone, all you have to do is look at Vivo or Oppo's latest handsets. We don't yet know what will be the objective of the third camera: it could be a telephoto lens, a super wide-angle lens or a dedicated black-and-white shooter (our bet is on a tele lens).
OnePlus will unveil its next flagship once it completes six months after the launch of the OnePlus 6.
That is why the OnePlus 6T will be 0.45millimetres thicker than the OnePlus 6, the Chinese firm continued.
The company has substantiated the rumours itself that alleged that the successor to OnePlus 6 will have an in-display fingerprint scanner.
The company wanted to introduce the technology on the OnePlus 5T a year ago, but "the technology wasn't mature to meet [OnePlus'] standards for delivering a fast and smooth user experience". Already the concept design is out and OnePlus 6T will come with an Oppo R17 body and the same hardware inside.
OnePlus will launch its next flagship phone 'OnePlus 6T' on October 17.