After iphone 3gs, which phone should i use?

After iphone 3gs, which phone should i use?

Go with new iPhone 5s

It depends, if you want to stay within the confines of all the apple restrictions then get the new iPhone 5 S or C. The C is the scaled down version of the S with a reduced price.

However if you want a better phone that does more and lets you customize it, add memory and doesn't have all the apple restrictions get the Samsung Galaxy S4.