Uniqly identify a mobile device visiting my WEB/WAP site?

[GrigoryPtashko]

Hello.

I am completely new to mobile WAP/WEB sites development. I am analyzing some mobile content delivery platform which I am going to implement. My question is: Is it possible to uniqly identify the specific mobile device that is visiting the site whether it is a WAP 2.0 device or a smartphone with a usual WEB browser? And later use this info to know that this specific device has already been on my site.

I see some means:

1. Usual telephone number (MSISDN) which is I suppose is a confidential information and is not passed to a WAP/WEB server. I think I cannot get it "for free".
2. IMEI of the mobile device. This looks interesting but the question is IS the IMEI passed somehow to a WAP/WEB server from a mobile device? If yes then I can save it and later identify a device against my IMEI DB.
3. Any other means which I do not know yet?

Sorry for chatter but I am not new to software development. I first google then ask but now I just don't understand from what side to come to this problem.

Thanks in advance,
Grigory.

 

[takeshi]

You'd have better luck in developer forum. The browser should identify itself unless it's presenting itself as a different browser. Generally, there's nothing sent to the web server to specifically identify the device model or even the individual device.