Sending messages for free using bluetooth

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Have you ever heard of bluejack. Its a way of sending messages to nearby bluetooth users using OBEX protocol. For this what you need to do is in your mobile phone under new contacts type the message you want to send in the name area. Save the message and send the information using bluetooth. This is simply called bluejacking. If you have tried this feature did you liked it. Or if you haven't used this feature then you would definitly love to use such feature.