For a full list of iPhone 4s Tips and Tricks visit apple.com/uk/iphone-4s/tips
There will not be an iPhone 4S for T-Mobile but you can get any iphone unlocked at unlockatt.com
Yes it will. iPhone 4s is a world phone, means, it will work with any carrier on any network (including CDMA & GSM). Ref: google "iPhone 4s world phone"
yes
yes it has 100 times the features of any other phone plus all the features of other phones but better!!!
Yes
The iPhone 4s is the 5th iPhone that Apple has made.
The current latest iOS version on the iPhone 4S is iOS 6.1.3 considering iOS 6.1.4 is for the iPhone 5 only. iOS 7 will be available for the iPhone 4S this fall.
iphone 4s
That requires jailbreaking to put widgets on your iPhone. Currently there is a tethered jailbreak for iPhone 4S But it i highly recommended that you don't jailbreak.
No. iPhone 5 is not better than the iPhone 4S.
Like all mobile handsets they are only as good as the applications that you require them to do for you. So if you need diary management then the iPhone has an app for that. Need to make a call? iPhone 4S then the iPhone can do that. Need a mobile phone that talks to you only the iPhone 4S can do that!