The fingerprint recognition feature built into the iPhone 5S brings convenience to users, but also causes some troubles to a certain extent. Overall, its impact is still significant.
Previously, there were doubts about potential security risks of the Touch ID on the iPhone 5S. Apple's explanation was that the user's fingerprint data, after being encrypted, was stored in the A7 processor. Well, here comes the problem.
Now, foreign media has conducted a test on the iPhone 5S. They bought two units at the same time and had two people store their own fingerprint data. Then they swapped and installed the Home buttons, and something interesting happened.
After the swap, the Home button failed to recognize fingerprints, meaning that it could not identify the previously stored fingerprint data from the iPhone 5S. When they reinstalled the original Home button, this situation disappeared, making the issue quite clear.
Regarding this situation, foreign media stated that Apple matched the A7 processor with the fingerprint sensor embedded in the Home button. This explains why swapping the Home button doesn't work properly. Apple likely did this to prevent someone from tampering with the data transmission between the fingerprint recognition sensor and the A7 processor.
The next question arises: what happens if the Home button of the iPhone 5S breaks? Obviously, randomly replacing it won't work. If you want to replace the Home button, finding a professional repair service is essential (currently, only Apple can handle it). This is because it involves transferring cables, sensors, and other components from the original Home button to the new one, which is both troublesome and increases the cost of repairs.
If your Home button is completely broken, the consequences would be dire. PS: Worried users should consider purchasing AppleCare+.