Myself provider

Introduction

Not so long ago, almost free tariffs for cellular communication with unlimited within the network began to appear, but prices for mobile Internet are not going to fall too much. A cheap Internet on the PDA \ laptop you want.

Myself provider

I think many people remember how the dialup worked. From one computer they called the server (friend’s computer) on which the modem picked up the phone. Similarly, the almost forgotten CSD works (they only call from cellular to the operator's number). However, CSD is quite expensive, so I would like to call your number. And here the problems begin. I managed to get this scheme to work only when receiving a call with a regular modem (however, this kills the idea, calling landline numbers is expensive). It is not yet possible to receive a cellular call, even if the handset is picked up, the call is not transmitted to the computer.
I would like to remind you that as a result you can get almost free internet.

Comparison with GPRS
Pros:
Cheap
Access to your computer \ LAN

Minuses:
Low speed
Signal quality should be high.
Stronger battery plant
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Maybe someone has an idea how to implement it? I would hope that anyone was interested in my idea.