I have had a SIM900 GPRS shield for some years but I have never used it, and I recently assumed it was obsolete because it is (probably) 2G. To make matters worse, I kept thinking it was a SIM800, but I now realise it isn't. Is the SIM900 shield good to go on a 3G network? I ask now because I have…

SIM 800? SIM 900?

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