Smartphone is the trend of nowadays society. More and more people choose to use smartphone instead of the outdated cell phone because the smartphone offers us more not only practical functions but also entertainment need. People can communicate freely and easily with their families, lovers, friends, teachers or colleagues. And smartphone helps people get rid of remember lots of phone numbers, e-mail addresses, birthday date, working schedules, daily notes and other information, because the apps on smart phone can save and manage these info very well. However, this phenomenon shows us that we rely on this device very heavily. If we accidently delete some important data like contacts, what to do? Don’t worry. This article will help you to easily recover your contacts from Android system.