[rosinamotta]

I find that if I send more than three or four mms messages in a matter of minutes, I will lose all of my messages after they go out. It clears out my box completely. It will continue to delete the msgs until I do a hard reset. How can I prevent this from happening short of avoiding mms msgs?!

[BlackBerryBob]

These will be the first items to go when your BB's memory level goes below critical. Most BB's (other than the Storm) require at least 10MB of File Free Memory to operate properly.

In short, make sure you clean your device's memory on a regular basis and exit out of applications when you're done with them.

Check out THIS THREAD for more routine maintenance instructions.