Welcome back to 2015. The age of material design, exploding Galaxy Note 7s (okay, that was 2016), and Android Lollipop. If you are holding a device running Android 5.1.1 today, you are likely holding a legacy device, a dedicated MP3 player, or a retro gaming handheld.
Step‑by‑step (generic, for Android 5.1.1) root android 511 without computer new
Install > Direct Install (Recommended).Enable Unknown Sources: Go to Settings > Security and toggle on Unknown Sources to allow installation of apps from outside the Play Store. The Time Traveler’s Guide to Rooting Android 5
Wait for Reboot: The process may take several minutes, and your device might reboot once or twice. Download Magisk Legacy Manager 2