if you want to send sms and you want the recipient of sms will not receive sms instantly .and you wants sms will be receive after specified period of time .you can do this by following method *latehours#Message
create new message start your sms form * then write (late) and write hour and write # and write you message and send it. your sms will be delivered to recipient after specified hour . for example:(* late 2 # how are you ) and send it you sms will be delivered after two hour .