If you cannot survive without your mobile device, you need to take steps to help find it if something were to happen.

Solution #1

If you have an iPhone, “Find My iPhone” is an app that is part of the iCloud suite that tracks your phone using a map. It also offers a remote lock so no one who finds it can use it and it even plays a sound to help you find it. As a final step, you can remotely wipe the phone clean. For other phones, you have to find out what security measures they have. Your mobile carrier can offer services to help recover your device as well. Find My iPhone (iOS)

Solution #2

“Lookout Mobile Security”, an app available on both iOS and Android, not only helps you find your device but also protects it from viruses. Lookout Mobile Security (iOS)
Lookout Mobile Security (Android)

Solution #3

Another way is to use a subscription-based service called “FoundIt!”. The service comes with a pack of stickers with QR codes that you put on your devices. These tags are associated with you but your information stored in the FoundIt system is not accessible to anyone who may have found your devices. FoundIt!