How do you turn off a cellphone with a text message?

Answer 1

You cannot shut down someone else's cell phone via a text message. Cell phones don't have that kind of capability built in. Certainly something like that (a built-in or programmable "feature" that would another phone to shut down the phone in question), but it's not a feature most people would want on a phone. Why would someone want a feature like that? It won't sell. Could a parent use the feature? Possibly, but a parent who wants more "say" in the use of a phone by their children would be told to find another way to deal with a problem if there is one. And no one wants some clown to be able to send a text message to shut their phone down. Anyone who wants to shut down another person's cell phone (via a text message or anything else) is malicious. It might be considered a prank or joke by the person shutting down another's phone. Consider how you'd like it played on you by someone else. Would you? Thought so.

Answer 2

There is no way to turn off a cellphone via text message. The phone must be physically turned off by pressing the power button.