How to restore a stolen iPhone 5 after being found? My iPhone 5 was stolen and I erased and removed it via iCloud.

After three days I found it and want to active it again.

What is the procedure for recovering the content and activating it again?
If you backed up your iPhone using iTunes (stored on your computer) or iCloud (stored in iCloud), restore from backup.

When your iPhone has sufficient charge to turn on, you probably see the "Hello" screen.  The following Apple Support article describes how to restore your iPhone from iTunes backup or iCloud backup:    https://support.apple.com/en-us/HT204686