this means that the itunes can downgrade your baseband ,as for example if you upfate your iphone to 5.0b1 than your baseband will reach to 4.11.04 but then you again restore to the 4.3.3 than your baseband will again comes to the 4.10.01 .
but what if you save your ssh of the 1.59.00 ie 4.0.x then you start the itunes will first connect to the internet than when it reaches to the baseband then it again connect to the internet to check for the baseband update and cancel it when it already of same version.
then what is tinyumbrella it means that it cancel the 2nd process of connecting the internet and thus baseband does not upgrade ,and therefore what is the probability that we can downgrade the baseband is that the ssh must be saved in the good manner ie if itunes request the ssh from the tinyumbrella then it should give that one which could even downgrade baseband ie make the itunes that which allows the abseband changing option and thus we can downgrade it from the beta version to the released .
have fun !!!!
