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GSM SIM800, SIM900 Solving AT+CPIN IS NOT READY, Network Registration Fail








# Problem
- GSM SIM800, SIM900 Solving AT+CPIN IS NOT READY, Network Registration Fail
- AT+COPS? Responding: +COPS: 0
- AT+CREG? Responding: +CREG: 0,0


# Check Points
-  AT+CSQ Respond: +CSQ: [someVal],0  > that means there is GSM signal
-  AT+CFUN? Respond: +CFUN: 1 > that means it is not in sleep mode.
-  AT+CSCLK? Respond: +CSCLK: 0 > that means Module is not in slow clock mode

#Solution
- AT+CMEE=1 : it will enable error report and module will respond with error code
- Check  AT+CPIN? : now it will respond with error code
- Mine one is AT+CPIN? : Respond : +CME ERROR: 10
- Then check the error code list and rectify the problem

- You can also try with, ATZ Reset Default Configuration and AT&F Factory Defined Configurat

- AT+CMEE=2 : it will enable error report and module will respond with details error


#Error Code
CME ERROR: 0     Phone failure
CME ERROR: 1     No connection to phone
CME ERROR: 2     Phone adapter link reserved
CME ERROR: 3     Operation not allowed
CME ERROR: 4     Operation not supported
CME ERROR: 5     PH_SIM PIN required
CME ERROR: 6     PH_FSIM PIN required
CME ERROR: 7     PH_FSIM PUK required
CME ERROR: 10     SIM not inserted
CME ERROR: 11     SIM PIN required
CME ERROR: 12     SIM PUK required
CME ERROR: 13     SIM failure
CME ERROR: 14     SIM busy
CME ERROR: 15     SIM wrong
CME ERROR: 16     Incorrect password
CME ERROR: 17     SIM PIN2 required
CME ERROR: 18     SIM PUK2 required
CME ERROR: 20     Memory full
CME ERROR: 21     Invalid index
CME ERROR: 22     Not found
CME ERROR: 23     Memory failure
CME ERROR: 24     Text string too long
CME ERROR: 25     Invalid characters in text string
CME ERROR: 26     Dial string too long
CME ERROR: 27     Invalid characters in dial string
CME ERROR: 30     No network service
CME ERROR: 31     Network timeout
CME ERROR: 32     Network not allowed, emergency calls only
CME ERROR: 40     Network personalization PIN required
CME ERROR: 41     Network personalization PUK required
CME ERROR: 42     Network subset personalization PIN required
CME ERROR: 43     Network subset personalization PUK required
CME ERROR: 44     Service provider personalization PIN required
CME ERROR: 45     Service provider personalization PUK required
CME ERROR: 46     Corporate personalization PIN required
CME ERROR: 47     Corporate personalization PUK required
CME ERROR: 48     PH-SIM PUK required
CME ERROR: 100     Unknown error
CME ERROR: 103     Illegal MS
CME ERROR: 106     Illegal ME
CME ERROR: 107     GPRS services not allowed
CME ERROR: 111     PLMN not allowed
CME ERROR: 112     Location area not allowed
CME ERROR: 113     Roaming not allowed in this location area
CME ERROR: 126     Operation temporary not allowed
CME ERROR: 132     Service operation not supported
CME ERROR: 133     Requested service option not subscribed
CME ERROR: 134     Service option temporary out of order
CME ERROR: 148     Unspecified GPRS error
CME ERROR: 149     PDP authentication failure
CME ERROR: 150     Invalid mobile class
CME ERROR: 256     Operation temporarily not allowed
CME ERROR: 257     Call barred
CME ERROR: 258     Phone is busy
CME ERROR: 259     User abort
CME ERROR: 260     Invalid dial string
CME ERROR: 261     SS not executed
CME ERROR: 262     SIM Blocked
CME ERROR: 263     Invalid block
CME ERROR: 772     SIM powered down



















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