There are a lot of application on Android market. However, I just figure out that there is a few application that useful and very easy to use.
Here are the must-have application for your android phone.
File Manager — to manage file, it also can install application from the sd card directly.
App Backup & Restore — to backup and restore apps on my android phone.
SMS Backup & Restore — to backup sms message to sd card directly.
Call Logs Backup & Restore — to backup call log or call history to sd card.
Each of them work very easy and fast.
They are all free application and available on android market. You can also schedule the backup process and let it does the work. The backup process is using the current date/time as a backup file name. So don’t worry it will replace the previous backup file.
Keep in mind that these application are only for backup application, sms, call history. To back up your Contacts and Calendar, you need to sync with Google account.