You can send the Anti-theft SMS commands from any mobile. The commands should be in proper format ie: if you want to send Wipe command to the Lost/Stolen device which had the eScan Secret code set as "0000" the command will be "Wipe:0000"(without quotes) and you will have to send the SMS to the number which is Lost/Stolen.
Considering the above example below are other Anti-theft commands that can be sent via SMS.
Scream:0000
Locate:0000
Lock:0000