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"...if Bluetooth, WiFi and GSM, and tried to merge them into one, you'd find the electronics would be more expensive....". Then it is better that we have only GSM/CDMA to communicate. If we keep 2 GSMs in same Iron box they wont communicate with the tower but they will communicate with themselves and may be with the computer; in the box, having Internet Dongle.... Please excuse me for concepts in Engineering; I am from Non Engineering background.
but short range (50/100/250/... meters ) gsm modem can be developed; which can work on internet/mobile (for LONGER range communication) only if connected to regulated device... what about friend's mobiile communicating with friend's internet dongle...
