Data Sheet
     Smart Machine Smart Decision 
SIM800 Series_AT Command Manual_V1.09  197  2015-08-03 
Mode 
Max Response 
Time 
- 
Reference  Note 
  A group of parameters <freq1>, <freq2>, <periodOn>, <periodOff>, 
<nextIndex> is used to define a tone. The index is defined from 0 to 
4.AT+SIMTONEX supports up to five tone and the tones will play 
cyclically according the order specified by <nextIndex>. For example, 
with "AT+SIMTONEX=1,10000,800,0,500,10,2,2000,0,500,100, 
2600,0,500,10,1,1700,0,500,10,4,2200,0,600,100,0",the order is 
800-> 2600->2000->1700->2200->800 and so on. 
  This command support play in call, but the <duration> is limited to 
10s. 
6.2.66 AT+CROAMING Roaming State 
AT+CROAMING Roaming State 
Response 
+CROAMING: <state> 
OK 
Execution 
Command 
AT+CROAMIN
G 
Parameters 
<state> 0 Home network 
 1 International network(different mcc) 
 2 Other network(different mnc but same operator) 
Parameter Saving 
Mode 
NO_SAVE 
Max Response 
Time 
- 
Reference  Note 
6.2.67 AT+CNETSCAN Perform a Net Survey to Show All the Cells’ Information 
AT+CNETSCAN Perform a Net Survey to Show All the Cells’ Information 
Response 
+CNETSCAN: (list of supported <format>s) 
OK 
Test Command 
AT+CNETSCA
N=? 
Parameters 
See Write Command 
Read Command 
AT+CNETSCA
N? 
Response 
+CNETSCAN: <format> 










