Can a iphone 4s be unlocked?

Can a iphone 4s be unlocked?

Yes why not. Http://unlockiphone.co.uk from here you can unlock your iphone officially in Apple's databse. Don't need to run any software or don't need to enter any code. You will get email after unlocking and you just need to connect your iPhone with iTunes.

Like all phones, yes.

Check Chronic Unlocks.