AC75 AT Command Set
8.4 AT+CREG s
AC75_ATC_V01.002 Page 201 of 569 10/30/06
Confidential / Released
0 Not registered, ME is currently not searching for new operator
Normally, status 0 occurs temporarily between two network search phases
(status 2). However, if it persists, one the following reasons may apply:
• Automatic network selection is active, but probably there is
- no SIM card available
- no PIN entered
- no valid Home PLMN entry found on the SIM
• Manual network selection is active and the selected network is available,
but login fails due to one of the following reasons:
- #11 ... PLMN not allowed
- #12 ... Location area not allowed
- #13 ... Roaming not allowed in this location area
In either case, user intervention is required. Yet, emergency calls can be made
if any network is available.
1 Registered to home network
2 Not registered, but ME is currently searching for a new operator
The ME searches for an available network. Failure to log in until after more than
a minute may be due to one of the following reasons:
• No network available or insufficient Rx level.
• The ME has no access rights to the networks available.
• Networks from the SIM list of allowe d networks are around, but login fails
due to one of the following reasons:
- #11 ... PLMN not allowed
- #12 ... Location area not allowed
- #13 ... Roaming not allowed in this location area
After this, the search will be resumed (if automatic network search is
enabled).
• The Home PLMN or an allowed PLMN is available, but login is rejected by
the cell (reasons: Access Class or LAC).
If at least one network is available, emergency calls can be made.
3 Registration denied
• Authentication or registration fails after Location Update Reject due to one
of the following reasons:
- #2 ... IMSI unknown at HLR
- #3 ... Illegal MS
- #6 ... Illegal ME
Either the SIM or the MS or the ME are unable to log into any network. No
further attempt is made to search or log into a network. User intervention is
required. Emergency calls can be made, if any network is available.
4 Unknown (not used)
5 Registered, roaming
The ME is registered at a foreign network (national or international network)
Two byte location area code in hexadecimal format (e.g. "00C3" equals 193 in decimal).
<stat>(num)(&V)
<lac>(str)