If you ish to protect the touch screen then it would be best to have a front cover.
The iphone 4s desigh as same as iphone 4, so you needn't worry about that ,my girl friend's iphone 4s use my iphone 4 case (buy form 708buy.com) all the time, I prove the iphone 4 case is fit to 4s
yes.
Yes
yes!
Yes the front and back side of the iPhone 4s is glass. This makes it very easy to break.
There are a lot of sites that sell iphone 4S covers, in my opinion www.ebay.com. Iphone 4 and the iphone 4s are both same size, so you could get an Iphone 4 case too.
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!
It depends. If the iPhone 4 case is for the GSM model (AT&T) then you can put it on, but the ringer slide button will be partially obscured. If the case is for CDMA models (Verizon) then yes, it will fit because when Apple made the Verizon iPhone 4 they upgraded it to be slightly different, and that is the shape all iPhone 4S's are now. iPhone 4 are very similar in shape with iPhone 4S. If you really want, you can put the iPhone 4S phone into a iPhone 4S case. but it may seems no good in apperance, as they are not exactly same.
outback
Yes, generally speaking a case designed for the Apple iPhone 4 will fit the iPhone 4S as well. However, this is not always the case, due to a revision of the placement of the silence switch. The case manufacturer will typically specify if the product is compatible with both models.
no the ipod is round and the iphone is rectangular
The iPhone 4S does not come with and included gel case. However, a variety of gel cases are available that fit iPhone 4/4s. Gel cases come in many colors and textures.