Losing an iPhone can be a traumatic experience, especially if you recently paid money for a new one. But circumstances needn鈥檛 be so dire with the help of iCloud and the iPhone's built-in GPS 鈥 if you鈥檝e taken the proper precautions.
After you鈥檝e set up iCloud, go into the iCloud settings and enable Find iPhone. You can also just download the Find iPhone app. Once signed up, you can track your phone on a map. From there, you can remotely force the phone play a sound, lock down the phone, have it display an alert message, or even wipe its memory.
Of course, this might not be necessary if you can find it via the GPS tracker. Just hope it doesn't run out of battery power ... or lose service.