user37828: I've recently bought a SIM900A A6 GSM module. Whenever I send a command it gives an error: +CME error 58.
Does anybody know what this means and how to solve it?

user20513: Your sim card is probably protected by a PIN. Easiest way to get it working is to put the SIM into a normal phone and remove the PIN protection.

37828: <p>I've recently bought a SIM900A A6 GSM module. Whenever I send a command it gives an error: +CME error 58.</p>

<p>Does anybody know what this means and how to solve it?</p>
 20513: <p>Your sim card is probably protected by a PIN. Easiest way to get it working is to put the SIM into a normal phone and remove the PIN protection.</p>
