Description : When I send someone an SMS and he has his cell phone turned off. Is it possible to cancel it before you turn it on? We drank a little yesterday and I did such a thing.
Last Answer : um, it doesn't work if you have "validity unlimited" set in your mobile phone, so if it is not delivered after 4 days the validity can be set for a certain number of hours, but of course not ... and explain (they will come after switching on just as easily or the other first) or steal a cell phone