There is a software called Super Bluetooth Hack Version 1.07 which you can download and install in your mobile phone in order to "hack" your friends mobile phone.The full functionallity of this software is available only in Sony Ericsson models,however there are plenty of functions supported in other brands.
Follow the steps:
1. Download here the Super Bluetooth Hack V1.07.
2.Unzip the file and send it to your mobile phone.
3.Install the software in your mobile phone.
4.Inquire new devices through the software.