Speaking way to unlock the phone, smartphone currently on the market basically uses a screen Fingerprint, rear and side fingerprint fingerprint. Many people feel that some of the performance not as good as the other two sides of fingerprint unlock, in fact you underestimate the side of the fingerprint, it is also far more powerful than you imagined!
First, the appearance of integration of
those equipped with rear fingerprint to unlock technology of mobile phones, mobile phone equipped with a fingerprint will be more beautiful side comparison. It not undermine the front of the phone screen, does not destroy the integrity of the back of the fuselage, to ensure the integration of the fuselage.
Second, increasing the user's unlock gesture
compared to the post-fingerprint and fingerprint to unlock the next screen, set both sides of the fingerprint is simply home advantage as a whole, it can achieve the solution at any position. In general, support the rear of the fingerprint with the middle finger to unlock the phone easy to use, support screen under the thumb fingerprint to unlock the phone easy to use, and support the side which finger fingerprint cell phone use can be.
Third, increase adjustable space
from the phone line configuration inside the fuselage of view, compared to the other two sides of fingerprint identification fingerprint identification methods can increase the likelihood of line configuration, you can leave more space to adjust the overall screen phone. 
Fourth, the payment will be more convenient
when paying unlocked, NFC phones will need to pay back close to the device, if it is post-fingerprint will appeared to be inadequate. The inner side of fingerprints and unlock the screen will make the payment on the phone steady sensitive area, it is a lot easier. 
V. unlock will be faster
do not know if you have not realized that, within fingerprint to unlock screen is quite embarrassing happens. Within fingerprint to unlock screen is divided regions, there may be no solution can not lock the screen to see when things start to use. The side of the fingerprint does not appear such a thing, will be able to touch a specific location to unlock. 
Overall, compared to fingerprint and screen at the rear fingerprint to unlock, fingerprints on the functional side, the effect of experience do have a great advantage. Now the market is the way to unlock the phone, talk about what you like most prefer?