Change the password on my email on an iphone 5S

Please go to: https://iforgot.apple.com/password/verify/appleid#!§ion=password

take phone and proof of ownership to an AppleStore

make sure you have the password right.

Contact Apple but expect to lose everything on it.

Hi, you cannot bypass the activation in iPhone because that's one of the security feature implemented by Apple, you just have to type in your Apple ID and password and you'll be able to activate your iPhone with no problem.

this problem solve only iphone care line. pls you contact iphone sels promoter.

iPhone 5C is iPhone 5 but the enclosure is plastic. iPhone 5S is much better technologically speaking

The Touch ID feature in the Apple iPhone 5S detects the iPhone owner's fingerprint and uses it kind of as a password, unlocking the phone and allowing purchases.
The more the feature is used the better the phone detects the fingerprint. The system can detect the fingerprint from different angles and rotations.

You don't need to use the fingerprint scanner on the iPhone 5s if you don't want to. Instead, you can choose to use your four-digit PIN number or to not use any password at all.

A fingerprint reader or sensor is basically the first step towards getting rid of passwords. It scans your fingerprint and matches it to a pre-defined image of your finger. Since every fingerprint is unique, the system can then securely verify your identity.
If you wish to read more about the fingerprint sensor benefit: http://www.theguardian.com/technology/2013/sep/10/iphone-5s-launch-fingerprint-technology