If your Blackberry is running slow and/or has a "lag-time", what can you do to speed it up? Also, if you back up all your messages on your desktop computer, then they will not be erased from the phone (if you erase all messages off phone)?
When mine is running slow I just take out the battery and re-insert it. If not you'l need to do a full restore on your BlackBerry to get it back to normal speeds.