The standard speed for dialup connections over GSM is 9.6kbps. In the UK, Orange (and only Orange) also supports HSCSD (High Speed Circuit Switched Data) which, with a handset that also supports HSCSD, will give a speed of 28.8kbps.
The alternative, if your handset supports it, is to connect with GPRS which, theoretically, should give speeds comparable to the 56kbps of PC modems, if not better.
<<< i have tried it with another phone and found that it could connect at 115Kbps >>>
I suspect that is almost certainly the port speed - 115,200bps - which is the speed at which the laptop and phone are communicating, *not* the speed of the internet connection between phone and ISP. Some serial port modems indicate the port speed instead of the internet connection speed, sometimes due to incorrect drivers being used.
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