My S21 phone stopped getting firmware and security updates

I checked my S21 phone and noticed that the last update occurred at 3:02PM on March 24, 2026. My latest update information is as follows:

One UI version: 7.0

Android version: 15

Security patch level: January 1, 2026

I am concerned that my phone is vulnerable with this level of updates. I talked with Samsung's live chat and they said Xfinity had it locked for updates and I should contact Xfinity. Could this be true?

Thanks for any information.

Jim

Responses

Oldest First

Selected Oldest First

BruceW

Gold Problem Solver

•

27.8K Messages

1 month ago

I checked my S21 phone and noticed that the last update occurred at 3:02PM on March 24, 2026. ...

Google says:

AI Overview

Samsung has officially ended regular software and security support for the original Galaxy S21 series (S21, S21+, and S21 Ultra), with their final security patch arriving in early 2026.

See https://www.google.com/search?q=S21+phone+firmware+and+security+updates

ETA: "The S21 FE continues to receive periodic security patches through 2027."

(edited)

0

U

user_lj12ja

Visitor

•

4 Messages

25 days ago

The S21 FE is unique in that it's scheduled to receive quarterly updates through January 2027. My phone is at the March 2026 release, yet Samsung has released 3 software updates. Xfinity, please release the updated software!

2

0

XfinityAmira

Official Employee

•

5.1K Messages

Hello user_lj12ja! We appreciate you taking the time to reach out about this software update concern. Please know that my team is always here to support you. I see that @BruceW shared the answer to your question, as well as a link detailing how Samsung has officially ended routine firmware and security updates for your device model.

I hope this was helpful. Please let us know if we can answer any other questions or concerns.

(edited)

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please mark as Best Answer. tick

Like

Reply

22 days ago

0

XfinityMichaelC

Administrator

•

5.4K Messages

Hey @user_lj12ja! Doing some research on your issue. Sometimes corrupted system update files prevent the phone from checking for new updates. Have you had a chance to clear the system update cache. This shouldn't delete any data as long as you clear only that (making sure you don't do a factory reset).

The steps on how to do this can be found here: Clear Cache partition