The 2nd and even 3rd point is not automatically true for every phone and setting. I have a combined fingerprint reader and power button on my Fairphone 5, and the 2nd thing has always worked just fine.
It also has the option to only enable the fingerprint reader if the display is on, which addresses your 3rd point completely. It means you can pick the phone up, including having a finger in the reader, and it won’t turn on or unlock. You need to press down in the button to trigger the screen, then it can be unlocked. That also means that when locking it and turning off the screen actively by pressing the power button with the phone on, it never re-unlocks. To be honest this part wasn’t a problem before the setting became available, as the locking would disable the fingerprint reader anyway, but letting your grip go slightly could trigger re-unlock.
Only activating the fingerprint reader when the screen is on is a regression compared to the rear reader. It means I need to squeeze the phone to unlock it, vs just placing my finger in the right spot. It also negates the purported advantage from the comment above mine about being able to easily unlock the phone while lying on a table.
I’m not arguing that the power button reader doesn’t work for anyone. I’m saying that it is qualitatively worse UX for me in particular.
The 2nd and even 3rd point is not automatically true for every phone and setting. I have a combined fingerprint reader and power button on my Fairphone 5, and the 2nd thing has always worked just fine.
It also has the option to only enable the fingerprint reader if the display is on, which addresses your 3rd point completely. It means you can pick the phone up, including having a finger in the reader, and it won’t turn on or unlock. You need to press down in the button to trigger the screen, then it can be unlocked. That also means that when locking it and turning off the screen actively by pressing the power button with the phone on, it never re-unlocks. To be honest this part wasn’t a problem before the setting became available, as the locking would disable the fingerprint reader anyway, but letting your grip go slightly could trigger re-unlock.
Only activating the fingerprint reader when the screen is on is a regression compared to the rear reader. It means I need to squeeze the phone to unlock it, vs just placing my finger in the right spot. It also negates the purported advantage from the comment above mine about being able to easily unlock the phone while lying on a table.
I’m not arguing that the power button reader doesn’t work for anyone. I’m saying that it is qualitatively worse UX for me in particular.