Important: Buy correct SIM card!

Important: Buy correct SIM card!

SainSmart Compatible wireless modules for GSM SIEMENS TC35 SMS Module Board UART / RS232 (Electronics)
Buy at Amazon.com

Customer Review

I have this super GSM module first tried with a SIM card from blau.de. But unfortunately do not support "Machine to Machine" communication. With a SIM card of Telekom it worked but then immediately and until now very reliable!

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