Ok I have an Iphone 3G that has been jailbroken with redsnow and I have the 6.15 modem firmware and my phone is unlocked using ultrasnow. Now that I've given you the diagnosis on my phone I will explain the problem. It gets really slow somethings and when I open certain apps (most times in combination...as in i already have an app opened) it'll just crash and go into safe mode. My Textnow app is the slowest of my apps by the way. Is there a reason for this and is there a way I can fix this?