Samsung warns users of a flaw that lets unregistered fingerprints unlock the Galaxy S10

(Image credit: Future)

A flaw is found on the Samsung Galaxy S10, which allows unregistered fingerprints to unlock the phone. The company says it's aware of the issue and a fix should be coming soon.

Last week, a Samsung Galaxy S10 owner found that her left thumb could also unlock the phone, but she'd only added the right thumb. It started happening after she applied a third-party screen protector to the phone. It was then tried on other S10's as well, and all of them confirmed the issue.

Samsung was quick to acknowledge this bug and issued a statement, promising a fix soon. It added that only "Samsung authorized" accessories should be used. In a statement to BBC, Samsung said that it is aware of the malfunctioning fingerprint issue and will soon roll out a software patch.

Unlike other in-display fingerprint scanning solutions, Samsung uses an ultrasonic fingerprint scanner on the S10 and the Note10. It allows fingers to be recognized even if they are wet or soiled. However, a thick screen protector will meddle with this scanning process, and that is likely to be the case here.

What should the S10 users do?

The issue currently seems limited to only a few screen protectors, and shouldn't be long before Samsung fixes even that. In the meanwhile, if you need to use a screen protector on your Samsung flagship, go for slimmer plastic ones, or continue using the pre-applied one.

Also, we would recommend you change the unlock procedure to another security method until Samsung releases a fix for the issue.

Aakash Jhaveri

Aakash is the engine that keeps TechRadar India running, using his experience and ideas to help consumers get to the right products via reviews, buying guides and explainers. Apart from phones, computers and cameras, he is obsessed with electric vehicles.

Latest in Samsung Galaxy Phones
Samsung Galaxy S25 Ultra on blue background with lowest price text overlay
Selling out: Samsung's incredible Galaxy S25 Ultra deal is still up for grabs - get $300 off upfront or a $900 trade rebate
The Samsung Galaxy S25 Edge on display the January 22, 2025 Galaxy Unpacked event.
Leaked Galaxy S25 Edge pricing gives us a clearer idea of how the super-slim phone will fit into Samsung's lineup
Samsung Galaxy Z Flip 6 in blue
The Samsung Galaxy Z Flip SE may launch months after the Galaxy Z Flip 7
an image of the Samsung Galaxy S24 Ultra
Finally! One UI 7 has a release date - here are the Samsung phones that’ll get it first
Samsung Galaxy S24 hands on handheld back straight white
The Samsung Galaxy S24 is getting one of the S25’s biggest video upgrades with One UI 7 – here’s why Log Video matters
An image of the Samsung Galaxy S25 Ultra from a hands-on event
Samsung's latest software upgrade could mean Galaxy phones beat iPhones for gaming – but you can't get it yet
Latest in News
Stability AI 3D Video
Stability AI’s new virtual camera turns any image into a cool 3D video and I’m blown away by how good it is
The Google Wallet app with a mode for kids shown on-screen.
Google Wallet’s new kid-friendly payment system is a win for parents
A man holds a smartphone iPhone screen showing various social media apps including YouTube, TikTok, Facebook, Threads, Instagram and X
A worrying Apple Password App vulnerability reportedlyleft users exposed for months
Google Pixel 9a
Google is delaying the Pixel 9a to fix a mystery “component quality issue”
The bottom left corner of an Android phone, showing the Phone, Messages, Google icons and Google Search bar
Google Messages remote delete will soon save you from texting embarrassment – and here's how it works
ExpressVPN mobile app and Aircove
ExpressVPN ‘reduces workforce’ for the second time in two years