lost messages in the inbox and call log suddenly on blackberry/Memory leak

Blackberry devices have some disease "memory leak", but more deeply it shows a situation where we often lose data unexpectedly, especially messages or emails and sms from the inbox and folders in the phone call data logsThe first thing we can do is check the free memory (file free) in our device, we can do in two ways:The first to enter the menu> options> status.second by pressing the ALT + SHIFT