OnePlus 7 has been teased by none other than OnePlus CEO Pete Lau. The teaser claims that the next-generation flagship will arrive with a "Fast and Smooth" experience. While it does not reveal any specifics, the teaser that comes along with a video clip suggests a curved display for one of the OnePlus models, which is rumoured as the OnePlus 7 Pro. It also hints at three new models in the new OnePlus 7 family. Separately, the OnePlus 7 Pro is tipped to debut with a Quad HD+ display and 90Hz refresh rate. This will notably the highest in the history of OnePlus smartphones.
The official teaser by Lau OnePlus will unleash a new era of Fast and Smooth. Especially Smooth! Smooth is more challenging than Fast - a true test of hardware and software. The new product is just beautiful - can't wait for you to see it!" he tweeted.
However, the tweet doesn't reveal any particular details around the specifications or design of the OnePlus 7. It, nevertheless, does give a glimpse at a curved display that could be associated with the OnePlus 7 Pro.
The video that comes along with the Lau's tweet teasing the new phone hints at three new OnePlus phones by showing the text "Fast and Sm...th". These are OnePlus 7 Pro 5G if we believe some recent reports. The regular OnePlus 7 is believed a keep a design similar to the OnePlus 6T smartphone, whereas the OnePlus 7 Pro and OnePlus 7 Pro 5G are said to carry a fresh design with a pop-up selfie camera module. 
OnePlus 7 Pro is rumoured be pack a pop-up selfie camera
Photo Credit: OnLeaks/ PriceBaba
Tipster Ishan Agarwal, on the other hand, purportedly leaked some of the key specifications of the OnePlus 7 Pro. The phone is claimed to come with a Quad HD+ Super AMOLED display with a refresh rate of 90Hz. This is unlike all the previous OnePlus phones that had a full-HD+ display with the 60Hz refresh rate. The enhancements would help the new OnePlus model deliver smoother graphics over the predecessors.
The tipster also mentioned in his tweet that the OnePlus 7 Pro would have USB Type-C v3.1, and a 4,000mAh battery along with Warp Charge 30W fast charging tech. The phone is also claimed to have dual speakers and triple rear camera setup with wide-angle and telephoto lenses.
Lau in his teaser didn't reveal the launch date of the OnePlus 7 family. However, considering some past reports, the new models by the Chinese company would debut on May 14.