Samsung has taken more than its fair share of criticism in recent months on the upgrade and update fronts. One UI 8 and now One UI 8.5 beta delays and a monthly security update that appears overly complex to users — users whose phones are out of action for a prolonged time when they do update, given the lack of seamless updates.
But here’s some good news. Per SammyFans, “Samsung has surprised Galaxy S21 users with another software update.” These are five-year-old devices that have now been relegated from monthly to quarterly updates. “But Samsung has now released three updates in just over three months.” And these are security fixes that matter.
The Galaxy S21’s latest firmware release “installs the November 2025 security patch, which improves system security and stability to provide a better Galaxy experience.”
One of those improvements better protects the fingerprint sensor, preventing “unauthorized access.” Another is especially topical, enhancing the security of wired USB connections, which has become a major focus over recent months.
The USB defense “helps protect the phone when plugging it into different devices or chargers,” which defends against the controversial threat from juice jacking. This is when a public charging point is actually a computer, stealing data unlocked devices.
That’s topical because it’s holiday season, which means airports, hotels and response. Public charging points — just like public Wi-Fi — becomes a much bigger deal.
Per SammyGuru, “the update is now live in Europe, carrying the firmware build version HYK1. It improves overall device security and system stability, ensuring a smoother and more reliable experience. Samsung previously revealed that the November 2025 SMR addresses over 40 vulnerabilities across the Galaxy lineup.”
These phones may be getting patched, but they’re not getting upgraded. They’ve reached the end of the road on that front. While it’s good news that security fixes are coming early, this won’t persist for long. If you have one of these phones, you should really upgrade to something newer that gets monthly updates as normal, not by exception.