Apologies if this has been covered - I'm not real up on the JB situation, but have been forced to upgrade due to some issues with Exchange at work with 4.0. Due to the timing, I won't be able to do much research on this, unfortunately. I currently have 4.0 jailbroken, and I believe I have blobs uploaded through Cydia (not sure how to check this). Can I upgrade to 4.2, and have an untethered JB? If so, how would I go about doing this? Thanks!