If you cannot use the above untethered options, these tools are reliable but require a "kickstart" after a reboot:
Enable features Apple locked on older devices, such as customized bluetooth connectivity. ios 9.3 6 jailbreak untethered
Plug your iPhone or iPad into the computer using a USB cable. If you cannot use the above untethered options,
: This is specifically for 64-bit devices (e.g., iPhone 5s, iPad Air 1, iPad Mini 2) running iOS 9.2 through 9.3.x. iPad Air 1