I am currently @ a hospital in orlando with my trusty BB pearl. There's a man down the hall with a dog who (the dog) can press the nurse call button when he has a seizure. My wife walks the dog since he can't. Well I went to see him and he has the ATT BB curve which his dog has been trained to dial 911 on! Yes the dog can call 911 on a BB. He has some water damage from a drop so it don't work so well but. Had to share this. I wish I could afford to get him a new BB.
He also said you could google begal belle and its all over the web. Have not tried it myself.
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