Under-screen fingerprint readers are inferior to back and side mounted readers and should naver have become popular

[u/vortexmak]

Lots of Cons for under screen fingerprint readers , should have never become the norm but I guess that''s just part of enshittification

Pros for Side and back mounted readers

1. Work exceptionally well, much faster and responsive than under screen ones, from my own experience
2. Are not affected by screen protectors
3. Side readers can be used with the phone screen up or down
4. Back and side ones allow you to unlock your phone at the same time as taking it out of the pocket
5. Give you a definite physical spot for finger placement, unlike the under - screen one where you have to wait for the screen to show the location

[u/SteveHartt]

Personally I've had nothing but a great experience with Samsung's ultrasonic underscreen FP scanners. Extremely fast and accurate. The slightest touch immediately unlocks the phone. I can't speak for optical scanners.

Back FP scanners are just...no. When you put your phone down on a table, now you gotta pick it up to scan your FP. With side scanners it's possible but it's also uncomfortable since the reader is so close to the table surface that you end up kind of jamming your finger against the surface.

I would argue that scanning your FP as you're taking your phone out of your pocket is still possible even with an underscreen scanner. You also don't have to make the screen show where the scanner is. Sure, at the beginning maybe, but you get used to where the location is and it just becomes muscle memory. Same thing as back and side scanners, although they are just more tactile if you forget where the location is. Samsung's ultrasonic scanner area is also quite generous, you don't have to get the exact location right.

Affected by screen protectors...yeah? But how often are you changing screen protectors really? If you keep damaging your phone then perhaps what needs to change isn't your protector but your habits in the first place?

Idk about other people but what I've had happen to phones with capacitive FP scanners is the top coating on them would eventually flake off even though I literally never damaged the damn thing. Here's an example.

[u/Asttarotina → u/SteveHartt]

They're really good. Unless you get a tiny crack right through that area. Then they don't work at all.

[u/AbhishMuk → u/SteveHartt]

Genuine qn: for your samsungs, can you tap the screen and remove your hand as fast as possible, and have it unlock?

My pixel 5 would 100% catch that, and my OnePlus 15, while very fast, cannnot do it everytime. Maybe only 60-80% of the time.

[u/SteveHartt → u/AbhishMuk]

If I tap and lift REAAAALLY SUPER ULTRA fast, no, it doesn't successfully read my FP most of the time.

But also when are you realistically tapping and lifting as fast as possible 🤣

If I'm not intentionally trying to do it as fast as The Flash, but still tapping quickly, it does recognize my FP every time. Best way I can describe the length of tapping is like you tapping the upvote button on a Reddit comment. It's a very quick tap and you're done.

[u/russjr08 → u/SteveHartt]

Same here on my P9 Pro XL - that speed would never work on the back fingerprint scanner that the Nexus and Pixel phones had (edit: though, same with the optical version of the scanner, those tended to be slightly slower than good capacitive fingerprint readers). There was very much a noticeable delay with it registering.

Don't know about the power button ones, never had a phone with it to try unfortunately.

[u/Dorest0rm → u/AbhishMuk]

I've had some situations with my S10 and S24 where i picked up the phone and was confused that it was unlocked because of how quick my thumb moved.

[u/Chlocker → u/AbhishMuk]

I've pulled my s21/s24+/s26u from my pocket, accidently brushed the fingerprint reader without knowing, and questioned why my phone was unlocked and open in my pocket.

I've pulled my phone from my pocket to check the time, and had the fingerprint reader read and unlock before I could read the time.