just an advice to apple iphone user. Fellow ios5 updaters, please preserve your baseband if you still want to use the gevey sim to unlock it. Apparently, the company is not yet out with an improvement to take care of the 04.11.08 and 04.29.09 basebands. Ultrasn0w is also working on making this baseband compatible.
So rather than be in a fix, you can prevent yourselves from staying in this fix because one does not know how long or how soon they will be available.