The Samsung S390G tracfone, and apparently ALL tracfones, dial 911 if the keyboard is pressed EVEN WITH THE KEYBOARD LOCKED. The tracfone support staff denies this. I've had 4 or five conversations with them, and each person said this can't happen, BUT IT DOES.
I bought this phone in early September, am not a heavy cell phone user, but it has happened to me at least 4 times, carrying the phone in my purse with the keyboard LOCKED. The last time, a few days ago, the Tucson Police Department called when I was out shopping, and when I told them I had not called 911, they told me in no uncertain terms to "set your phone so that it cannot dial 911 accidentally".
Unfortunately, this is considered to be a "feature" for tracfones, and CANNOT BE DISABLED.
Also unfortunately, I've looked all over the internet trying to find a hard case for this phone, but apparently no one makes one that fits this particular model. Without a hard case, I am afraid to carry the phone now turned on, EVEN WITH THE KEYBOARD LOCKED, because I don't want it dialing 911 accidentally. One time this happened when all I did was lay my purse on the car seat.
I wanted to exchange this Samsung for the LG800G (which I know I can find a hard case for), but Tracfone will not do this since technically the Samsung is not defective. Useless, but not defective. If you are thinking about buying this phone, be aware that it's risky carrying it in a purse or pocket, and no hard case is available for it that would protect the keyboard from accidental pressure.