This might have been answered before, but I haven't found an answer...
I changed the SIM in my phone for testing and then send a command to the 'new' number the phone receives the command as an SMS in clear text, as in 2222 LOCATE (2222 replacing my password). The command is issued and works, but in real circumstances the current owner of my phone would see the password and be able to disable antiTheft?
I could lock it, but then the thief/dishonest finder would be aware of antiTheft and switch off the phone or flash it. If they are unaware I could track them.
I would have thought the command SMS were 'silent'?