[Galaxy S 4 Active General] mikelets456:
From the AT&T website

http://www.att.com/esupport/article.jsp?sid=KB420364&cv=820

Update the Software for the Samsung Galaxy S 4 Active (i537) to Android 5.0 (Lollipop)

Update summary

Effective April 21, 2015, AT&T will release the Android 5.0 (Lollipop) software update for the Samsung Galaxy S 4 Active (SGH-I537). The update is available to customers to download via Firmware Over The Air (FOTA). Wi-Fi is required for the update and depending on the customer's current Android version, the file size is 974MB - 1.0GB.

What's changing?

Android 5.0 Lollipop Highlights

Songs, photos, apps, and even recent searches from one Android device can be immediately enjoyed across all of your Android devices.

New User Interface look and feel, more fluid motions

Priority mode to only allow certain notifications to get through

Battery saving features and remaining time left to charge or deplete indicators

Smart Lock to secure phone or tablet by pairing it with a trusted device like a wearable or car

Most frequently used settings available with just two swipes down from the top screen

Details at: http://www.android.com/versions/lollipop-5-0/

What to expect after the update

Although there should be no impacts to settings or data, we recommend that you back up your media files to an SD card, a PC, or using a favorite application (from the Play Store), prior to upgrading the software. You can also backing up and restoring your phone using Sansung Kies.

User-initiated software update

From the Home screen, press the Menu key, and tap Settings.

From the More tab, tap About device.

Tap Software update.

Tap Check for updates.

The phone displays: Software update process will not delete any personal data on your phone. Check the AT&T server for new software update?

Tap OK.

A status message displays:

Checking for update; Processing&The download for the software update will begin in a moment. The software download may take several minutes.

Downloading

Software update: A software update is available for your device that requires Wi-Fi connectivity for download progress to begin. Connect to a Wi-Fi network? For a list of free Wi-Fi networks click here AT&T Wi-Fi Hot Spots.

Select Continue or remind me later.

The phone displays: A new software update from AT&T is available for our device. This download will occur over Wi-Fi. Please make sure that you stay within the Wi-Fi coverage area while the download takes place. This could take several minutes.

Tap Continue.

A status message displays:

Downloading software update, Please do not leave Wi-Fi coverage area.

A new software update from AT&T is available for your device. This software update will take several minutes and will not delete any personal data on your device. All service (including emergency calls) will be suspended during the install.

The device will automatically restart once the new software has successfully installed.

Update Complete. The software has been successfully installed. Your device is now ready to use.

Tap Done.

Verifying the update

From the Home screen, press the Menu key, and tap Settings.

From the More tab, tap About device.

The following information displays:

Android version: 5.0.1

Baseband version: I537UCUCOC6

Kernel Version: 3.4.0-4554112

Build Number: LRX22C.I537UCUCOC6