One of the problems with HTC ChaCha mobile phone is its low storage space. After installing two or three applications, it starts going low on storage space. There are options to clear the memory space such as resetting to factory defaults that frees up most of the space but it is not always viable option.
The method that I helped me to get out of low storage space is cleaning up cache and data for most of the unused applications. To do that navigate to Menu >> Settings >> Applications >> Manage Applications. Now select your applications and start clearing Data and cache by pressing “Clear data” and “Clear cache” buttons. Caution: Note that these operations will delete all the data right from user name and password for that application. So exercise caution while cleaning up data and cache of critical applications.