When it comes to spying on the sms messages of someone’s mobile there are generally two choices which are available. The first option involves searching through the person’s mobile phone for any incriminating text messages.
This is usually a long process in which you must be consistently monitoring their sms messages in order to reap any result. If the person is aware that they are being watched it is a great possibility that they would stop using this method of communication or erase any correspondence which might get them into trouble. Either way it is easy to recognize that this is not the most efficient method there is.