[header] How to reset a cell phone [title] Back up your iphone before resetting. [step] Resetting your iphone will delete all of the data that's stored on it. Backing up your iphone will allow you to restore your data after resetting. 
Music and other itunes content will need to be re-synchronized from itunes or re-downloaded from icloud after resetting. There are two ways to backup your iphone data : [substeps] Open the settings app and select " icloud.