Root for Galaxy S4 Active SGH-i537 - AT & T

Root for Galaxy S4 Active SGH-i537 - AT & T

1. First go to Settings and click the "More" tab. Then go into security and check "Unknown Sources."

2. Visit http://geohot.com/activeroot from your device and click the lampda picture to download the apk file

3. Run the apk. It should give you a message telling you that you have root. Worked almost instantly for me.

4. Visit the Play Store and download SuperSU. (NOTE: You MUST download and use SuperSU to manage superuser permissions, nothing else. Only SuperSU currently can circumvent Samsung's "root blocker" in the kernel.)
5. Open the Super SU app and update binaries.

6. Optional. Donate. I contributed $10 to the original bounty, but really... this is a quick and simple method. Toss him $5 bucks if this root helps you out!

Via : forum.xda