My wife and I both have the S21. I receive regular monthly security updates but she has not received one since May. Her phone says the software is up to date when it obviously is NOT!
Step 1. Connect your device to your computer using the USB cable provided with your device, and then open Smart Switch on your compute
Step 2. If a software update is available, Smart Switch might automatically prompt you to update the software or will display an option to update
Step 3. Click Update and use the on-screen prompts to download the necessary files
Step 4. Click OK to proceed. Your device may turn off and on a few times during the update process. When the update is complete, the device returns to the Home screen
Note: Don't disconnect the USB cable or use your device...
If SmartSwitch is not giving you a certain overdue update, the next step is to reach out to your carrier for further assistance, since updates are provided over the air to your device by them (NOT by Samsung).
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I tried this and it still says I am up to date. It has been almost a year since I have had an update. I've had no updates since unlocking phone from at&t
