Update

Hey there @Cookyuma 

Samsung is a separate company from us, therefor we would not be able to assist you with the software update. I would recommend you reach out to Samsung directly at 1-800-SAMSUNG (1-800-726-7864) any time for assistance with this issue. Below is the link to their support page which also includes a text chat option to get some help. 

Samsung Online Support 

Hope this helps,

Hunter

Is the update through the phone (samsung), or the carrier, I have boost mobile as my carrier, anyways I'm stuck at Android 13, phone says I'm up to date

Hi @Cookyuma,

We hear you, and let's get the help you require with regards to the software update.

In response to your question, the updates to AT&T devices are rolled out by IMEI. The Android OS is owned by Google, and they send updates over to various devices running Android. AT&T notifies customers about the update once Samsung makes it available to the public. While we completely understand how uncomfortable this issue is for you, we humbly request you to remain patient as you will receive an update soon.

Here's the link to find more information in regard to the software update for the Samsung Galaxy S21 Ultra:

Samsung Galaxy S21 5G / Galaxy S21+ 5G / Galaxy S21 Ultra 5G (SM-G991U/SM-G996U/SM-G988U) - Software Update for the Samsung

Let us know if this information helps!

Thanks for visiting AT&T Community Forums.

Kelly, AT&T Community Specialist.

Facing same issue, tried on many forums but could not find any solution.

@mazedarjourney12  And were the responses on the other forums different than the responses already in this thread?

AT&T branded Android phones only update when connected to the AT&T system which means AT&T customer prepaid or postpaid, and in the United States 

If you have switched to a different network, that might be why you are not getting updates