While rooting is generally legal in most regions, it almost always voids your manufacturer warranty Data Privacy:

While rooting is often associated with technical users, KingRoot 5.1.2 was built for a broader audience: KINGROOT: How To One Click Root Your Phone

If you have an older device running Android 5.1 and wish to proceed, the installation process is straightforward. However, —rooting always carries risks.

Safety is the number one concern for any rooting tool. Here is an honest assessment: