1. You will be pleasantly surprised to clear the cache file of the program.

2. enter the phone settings option, and then select settings > applications > manage applications.

3. Press the Menu key, select the "Sort by size" option (if it is an Android 2.2 phone, you must first select the download tab), and then you can sort all the applications installed on the phone according to the application size.

4. Click an application in the list. If the application has cache files to show the size, click the "Clear Cache" option directly to release the space occupied by these cache files.

5. Some applications may have several MB of cache files, such as Google Maps, Marketplace, browser, photo album program, etc. Clearing the cache files of these programs can free up considerable space.

6. Many mobile phone manufacturers have pre-installed their own UI programs on their mobile phones, such as HTC Sense and MOTOBLUR. If you plan to replace HTC Sense with a startup program like LaunherPro or ADW, you can clean up or even delete the data files of HTC Sense. This operation can make your mobile phone have dozens of MB more space.

7. In addition, Android Market also provides some applications that automatically clear cache files, such as Quick App Clean Cache. For mobile phone users who have obtained root permission, they can download programs such as CacheCleaner, CacheMate and MoveCache from the market to quickly and conveniently clean up the program cache files.

Second, delete applications that you never use or rarely use.

This is a problem that many users will face. It may be an obsessive-compulsive disorder to silently endure the alarm of insufficient memory in mobile phones and even sacrifice system performance, that is, to be reluctant to delete applications that have never been used or rarely used. Delete these programs and you will find that the mobile phone has a broad vision and you have nothing to lose.

Third, move the movable application data to the SD card.

Mobile phones running Android 2.2 support installing applications on SD cards, so be sure to check all the applications you have installed. If you support the function of converting app to SD card, you must move them to SD card, which will save considerable capacity for some large software, especially game programs. However, it must be noted that Widgets, Widgets bundles, dynamic wallpaper programs and those applications that need to run in the background and interact with the system should not be stored on the SD card, otherwise the programs may not work normally.