Hi! I've got a Sagem Modem: http://www.cooking-hacks.com/index.php/gprs-quadband-module-sim900-for-arduino.html And I'm using a micro-SIM Card 3G 128. To test it I'm accessing a webservice that increments when the modem reaches a webmethod. Well, the thing is that nothing happens. The webservice …

[GSM/GPRS] SIM Cards to use

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