Seeworld 850 User Manual page 10

SMS command to the device to delete the number.
SOS,D,serial NO.1,serial NO.2,serial NO.3#
"D" means to delete the number, for example:
SOS,D,1# means to delete the first number
SOS,D,3# means to delete the third number
If you want to delete more than one numbers, you can send this command:
SOS,D,1,3# means to delete the first and third numbers.
If you forget serial number of the mobile number you want delete, you can
send this command:
SOS,D,mobile number# means to delete the mobile number directly.
For example:
SOS,D,13527852360# means to delete the 13527852360 directly.
After deleting the SOS number, it will receive "Delete number 135XXXXXXXX
success! specific number total 2" for successful deleting of the specific
number.
6.6 Set the center number
If you want to cut off/restore oil by SMS command, you have to set a center
number firstly. Only the center number can send the cut off/restore oil
command to the device. You can set your own mobile number as center
number.
The command for setting center number is:
CENTER,A,mobile number#
For example:
CENTER,A,15942703401#
If set successfully, there is an "OK" reply message.
Note:
Only SOS phone number can send this command successfully to set the
center number. There is only one center number can be set.
6.7 Delete the center number
SMS command to the device to delete the center number.
The command is:
CENTER,D#
For example:
CENTER,D#
If set successfully, there is an "OK" reply SMS.