LG Xenon GR500

When you are on the phone with someone on the Xenon, both you *AND* the person you are on the phone with are alerted with a beep everytime you get another call or a text. Does anyone know how to stop this?

Also, all of my passwords (e-mail, Facebook, etc.) are automatically saved in the browser, and I can't get rid of them! Anyone who picks up my phone can read my e-mail or Facebook.

Help!!