Custom Recovery for Samsung-SM-T337A?
Don't expect anything for AT&amp;T devices - AT&amp;T intentionally locked down the bootloader. Unless the device is popular enough to attract devs to work around it (Safestrap), you're out of luck.

In the meantime, there should be recovery-free Xposed installers around, but they're much less reliable. (link unavailable - on my phone right now)