My 3G was recently jailbreaked using redsn0w 0.9.6b4. Thus no tethering jailbreak and working Cydia. I installed SBSettings 3.2.1 (The latest one suppose to be working on 4.2.1). After installation and then reboot, I get the following message: SYSTEM VERSION TOO NEW ACTIVATOR HAS NOT BEEN TESTED WITH THIS VERSION OF IOS SOME FEATURES MAY NOT WORK AS DESIGNED I can then only choose to ignore this message or get more info (which does NOT provide more info ). After ignoring the issue I can start SBSettings by swiping the status bar and everything appears to be working, except for when you turn on a toggle that was not on by default. When you do this and then exit SBSettings, Springboard crashes after it tries to restart Springboard. This puts the device in safe mode. The only way I can get out of Safe Mode is to remove SBSettings, Activator and sbsettingstoggles from Cydia completely. Has anyone experienced this?