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GSM

GSM and 4G modules: SIM800L, SIM800C, SIM900A and SIM808 with GPS, A9 and A6 GPRS modules, SIM900 shield and A7670C 4G LTE module.

Modules for sending SMS, making calls and connecting to the internet over the mobile network: SIM800L (with and without antenna), SIM800C, SIM900A, the SIM900 shield, SIM808 with built-in GPS, A9 and A6 GPRS modules and the SIMA7670C 4G LTE module. Older 2G modules depend on 2G coverage from your network, so for new projects a 4G module is the safer choice. GSM modules draw short current peaks of up to 2A, so give them a strong power supply.

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