Some jailbreakers have ran into a few problems when attempting to jailbreak using Absinthe 2.o (or 2.0.1). Essentially, a couple of “lockdown” errors have been appearing for particular users. The messages, “Error detecting device (lockdown error -5)” and “Could not connect to lockdown,” might sound complicated but fortunately, there’s a quick and easy fix, according to @pod2g. All you need to do is head over to the Settings app, and reset “All Content and Settings” (Settings, General, Reset, Reset All Contents and Settings). Then, be sure to download the latest version of Absinthe: once you’ve done this, the jailbreak should execute perfectly.
Feel free to get in touch using the comments if you run into trouble!