I do not have or use and SD card...only the internal memory. When I'm not connected to a PC it recognizes this. All of my ringtones and notifications are present. When I connect to a PC, though, the phone seems to want to only use the SD memory. I can't see my custom tones, all applications want to use SD memory, and apps only want to download new info to a non-existent SD card. Is there a way to change this behavior? It's driving me nuts. When I'm connected to my PC and my phone rings...it uses a default tone. The first time it happened I had no idea what the sound was.