You never are quite sure. At our office we don't touch such things since it's never a sure thing it would work right.
Iphone 3gs with iOS 3.x
I haven't update iOS since I got my iphone but i did jailbreak an year ago with "Spirit"
1> recently my iphone battery ran out of battery completely. After I recharge the battery, several problems start. I can't open many app (many of them download from apple itune store). And I can't get the time and date update with T-mobile.
2. New iOS keeps getting updated. I hear newer iOS require more powerful hardware to run them smoothly. Do I have to keep updating my iphone 3gs with latest iOS? Will it slow down my phone if I update?
Thanks for any input or answer