How do you build a mobile phone simulator using the PC?

What do I need to convert a PC into a mobile phone simulator? What are the devices needed for transmissions and reception? Is there a code I can get to upload into my PC to make it work? Is the code also written in Java?How do you build a mobile phone simulator using the PC?The J2ME package has mobile phone simulator. you can use it to develop programs for the mobile phone. It wont receive transmissions, but you can simulate how things work.How do you build a mobile phone simulator using the PC?I always thought that these simulators like at sonyericsson.com are flash films, which looks and works like the phone but isn't really the phones software...