[Samsung Galaxy S10 Guides, News, & Discussion] Intratech:
I know there are loads of threads regarding the fingerprint reader on the S10 family of devices but I want to park those discussions and instead do something of an investigative thread based solely on a guess based on my experience. So I pre-ordered the S10 and got mine when the first batch was sent out on 8th of March to customers. From memory, the phone was manufactured in February but can't remember the exact date. It was fine most of the time but the fingerprint reader was a bit hit and miss, working when it feels like it and deciding to take time off and going on vacation when it couldn't be bothered. The phone's SD Card reader when decided it couldn't be bothered working full time as well and switched to part time work: https://xdaforums.com/galaxy-s10/help/experienced-issues-microsd-card-t3917353

So as any sensible person would, I got a replacement for it which arrived 2 days ago. This device was manufactured 06/03/19. The fingerprint reader on it is absolutely spot on! Literally works every time either with the screen completely off or on and I'm not doing anything differently from when I had the first device. It even works well with wet finger & water on the screen over the FP reader as you can see here: https://drive.google.com/file/d/1zQfuA_l4O5uFDzxnkpLI3ZZ-jEC5S9LL/view?usp=sharing

What I'm proposing is for you to tell us the manufacture date of you device and if you're having trouble with the fingerprint reader so we can see if there is a link with the manufacture date of the devices that have a work-shy fingerprint reader and those that have one that do not mind full time work. You can use this program to get the manufacture date of your device: https://play.google.com/store/apps/details?id=org.vndnguyen.phoneinfo

Collected Data

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cookie2: Manufacture date: 19/03/2019 Fingerprint reader: Works well

Intratech: Manufacture date: 06/03/2019 Fingerprint reader: Works well

Tel864: Manufacture date: 03/03/2019 Fingerprint reader: Works well

ojpd: Manufacture date: 02/03/2019 Fingerprint reader: Works well

dansan382: Manufacture date: 27/02/2019 Fingerprint reader: Works well

aussiesausage: Manufacture date: 17/02/2019 Fingerprint reader: Works well

Outbreak444: Manufacture date: 15/02/2019 Fingerprint reader: Works well

duckynawal: Manufacture date: 14/02/2019 Fingerprint reader: Works well

almaalma74: Manufacture date: 12/02/2019 Fingerprint reader: Works well

vazovskiiii: Manufacture date: 02/02/2019 Fingerprint reader: Works well

Mixxxk: Manufacture date: 31/01/2019 Fingerprint reader: Works well

Norup58: Manufacture date: 29/01/2019 Fingerprint reader: Works well

memocatcher: Manufacture date: 29/01/2019 Fingerprint reader: Works well

Davey Dual Sim: Manufacture date: 26/01/2019 Fingerprint reader: Works well

Kemby13: Manufacture date: 24/02/2019 Fingerprint reader: Works well (Longer to read very dry finger)

PapaWangsta: Manufacture date: 14/02/2019 Fingerprint reader: Works well but problems reading dry finger

SwordOS: Manufacture date: 02/02/2019 Fingerprint reader: Works well (Longer to read very dry finger)

Zmantech: Manufacture date: 14/03/2019 Fingerprint reader: Issue with wet fingers

Maddie01: Manufacture date: 05/03/2019 Fingerprint reader: Issue with wet fingers

evo85210: Manufacture date: 03/02/2019 Fingerprint reader: Issue with wet fingers

force70: Manufacture date: 12/03/2019 Fingerprint reader: Problematic

flopyro: Manufacture date: 25/02/2019 Fingerprint reader: Problematic

peachpuff: Manufacture date: 18/02/2019 Fingerprint reader: Problematic

ray_longo: Manufacture date: 15/02/2019 Fingerprint reader: Problematic