We are sure that some of you prefer the fingerprint sensor on the front and others on the back of the devices, but in reality the final decision is always the manufacturer itself. Some users argue that it is better to have the fingerprint sensor on the front, making it easier to unlock the device while it is on a table, and others explain that it is best at the back because when lifting the terminal with your hand it is much more accessible. Be that as it may in this case of the new Samsung models, the Galaxy S8 and S8 + will implement it on the back and it is said that they could have implemented it below the screen, but the lack of time to develop this technology so important it made them slow down.
It must be made clear that the fingerprint sensor today is essential in all new smartphones and without a doubt having to implement the sensor on the back is not something common in the devices of the South Korean company, so there had to be a powerful motive. The almost entire screen on the front is the main "problem" for the location of the sensor, something that they tried together with Synaptics was the implementation of the same below the screen, but the lack of time for as explained The Investor The main problem has been not to add it in this model and wait for the next one.
This type of news is not usually explained in the presentations and obviously the South Korean company will not make any statement about it, like Synaptics itself. It may be that the next Samsung Galaxy S9 add the fingerprint sensor just below the screen or even that the company carry out tests with a smartphone from its extensive catalog before that launch, we will see.