Speaking to Android Police, a source close to Samsung's plans for the device revealed that the headphone jack and all physical buttons will be removed. As per the rumour Samsung will replace the horizontal rear camera setup with vertical camera setup.
According to leaks, the Galaxy M40 will run the Qualcomm Snapdrago 675 processor, which has also been seen on the popular Redmi Note 7 Pro.
The upcoming Galaxy Note 10, or at least that's what we presume it'll be called, since it'll follow 2018's Note 9, is expected to be announced in August. The punch-hole cutout will also be smaller compared to the Galaxy S10 and Galaxy S10e.
As for the headphone jack, Samsung is one of the only device manufacturers to have stuck with the headphone jack on high end devices but it seems that might be at an end. The report also mentions that removing the buttons would lead to an indirect benefit as well - the button cutouts in a smartphone's frame are usually structurally the weakest points in a phone's body, and removing them might help Samsung build a thinner phone without compromising on structural integrity. The Galaxy M30 came with a hefty 5,000mAh battery, whereas the Samsung Galaxy M40 specs show a 3,500mAh battery. It may come with an S Pen camera and may implement a quad-camera system.
This would make it the first flagship Samsung handset without a headphone jack, and with the device still needing a stylus would likely not bring any significant benefits in terms of thinness or other features. The Galaxy M40 will most probably have a 6GB RAM and 128GB of maximum storage.