solution to lg ls740 boost root
1. Download “Towelroot apk” (do a google search and it should be by Geohot)
2. Tap the “Make it ra1n” button
3. Install busybox installer from the play store
4. Install busybox within the busybox installer.
5.Reboot device.
6. Install Supersu from the play store.
7. Run Supersu, it will update binaries
8.Reboot phone
9. Download Root Checker from the play store.
10. Open root checker and Voila, you LG Volt is rooted.