User's Manual

SEQUANS Communications Confidential and Proprietary
GM01Q/NB01Q User Manual,
Revision 1 Application Note
13/22
o From the Terminal, enter : AT+CEREG=1.
 This command will allow getting notification every time there is a
change of the network registration status
o From the Terminal, enter : AT+CFUN=1
o Response will be
 OK
 Followed by
 +CEREG=<stat>
o <stat>=0 : Modem is not registered and is not currently
searching an operator to register to.
 Possible cause : SIM card error or registration
ongoing
o <stat>=1 : Modem is registered on network –Kit
connected-
o <stat>=2 : Modem is not registered, but is currently
trying to attach or is searching for an operator to
register to.
 Possible causes:
 No network available
 Available networks have bad coverage
 PLMN available but the registration is
rejected
o <stat>= 3 : Registration denied
 Possible causes:
 Illegal mobile equipment
 IMSI unknown at HLR
 PLMN not allowed
 Location area not allowed
 Roaming not allowed in this location
area
 Network failure
 Network congestion
o <stat>= 4 : Unknown. Transitory value
o <stat>= 5 : Modem Registered in roaming mode