iPhone 5s got stolen?

[Crystal]

If your phone is stolen and you have set up find my iphone in icloud on the device before, you can try to locate your device with find my iphone. Go to http://www.wikihow.com/Find-a-Lost-iPhone
If it does not work, it is better for you to contact your service provider and see if they can help. To prevent your new idevice from being stolen or lost in the future, I suggest you apply some free anti-theft apps like iLostFinder except set up Find My iPhone/iPad/iPod in iCloud on the device. It will take pics of the thief or finder when she/he tries to open your device with a wrong pass and then send the pics to your email etc. Hope it helps.

http://ikeymonitor.com/free-apps