How can I backup/restore my Android data?

[tray22]

What will happen if I just copy everything on my old android phone using my pc and paste into my new phone?

 

[B. Diddy]

Welcome to Android Central! Sorry, but that won't work. What data are you trying to backup and restore? Remember that any data from Google apps (like contacts, Gmail, Google+ Photos) will be synced with your Google account in the cloud, so that will all sync with your new phone when you log in with the same account.

There are a number of backup and restore apps available. Helium is probably the most popular.