Samsung was previously rumored to be working on an under the display fingerprint sensor for the Samsung Galaxy S9. Before the iPhone X launched, it was also rumored to come with one, Apple never planned to do this, instead they ditched the fingerprint sensor altogether.
Samsung has apparently cancelled their plans to locate the fingerprint sensor under the display on the Galaxy S9 and Galaxy S9 Plus. The handset will apparently feature a fingerprint scanner, although this will be located on the back of the device like the Galaxy S8.
According to a recent report, Samsung has been working on an under the display fingerprint scanner for the last few years. They were apparently not able to do this due to technical difficulties. Samsung has now apparently finalized its plans for the final design of the Galaxy S9 and S9 Plus.
We heard previously that Samsung will have an exclusive on the new Qualcomm Snapdragon 845 processor at launch. Samsung will apparently get the processor a couple of months before any other manufacturers.
Samsung is apparently planning to start production of the Galaxy S9 and S9 Plus in December, the handsets are expected to launch in early 2018, possibly in the first quarter, although it is more likely that we will see them early in the second quarter.
Source The Investor