Are you located in Australia?  Stuff you should know about mobile phone monitoring software and services in Australia:

[easyazon_block add_to_cart="yes" align="left" asin="B00ECMV96G" cloaking="yes" layout="top" localization="yes" locale="US" nofollow="yes" new_window="yes" tag="wwwyourguidet-20"][easyazon_cta add_to_cart="no" align="left" asin="B00ECMV96G" cloaking="yes" height="28" key="small-light" localization="yes" locale="US" nofollow="yes" new_window="yes" tag="wwwyourguidet-20" width="120"]Employers: Seek professional and independent legal advice before subscribing, installing and engaging in the use of software designed to track, monitor, record conversations, collect information and any purposes that displays the movements on a map of a person and their mobile telephone.  Fully Disclose: to your employees and/or family members your intent in using the software on their mobile phone telephones and fully demonstrate and disclose the information you are collecting, storage methods and the information you are collecting and what information obtained by the cell phone monitoring software of employees and children can be retrieved from you.  In other words you need to be fully transparent and be aware of the privacy rights of the third party you are monitoring and tracking.  As an employer, you should also provide the intent of your monitoring and the outcomes of any monitoring including disciplinary action if applicable that could result.  We specifically draw your attention to the fact that it is illegal in Australia to record and listen into another persons phone conversations or surroundings using electronic devices and monitoring software without that particular parties knowledge – We advise that you should make yourself aware of the various State and Federal Acts related to telephone monitoring.  Commonly referred to as an invasion of privacy you should be aware of ethical and moral considerations and not undertake surveillance of a person without their knowledge.  The aim of this site is to allow tracking and monitoring openly with all parties knowledge and create awareness that their phones can be located if lost or stolen or tracked at any time (for business efficiency reasons) with full and open access to the data being collected if that be the case.  http://investigateway.com.au/resources/bugging.html

Further reading:

ELECTRONIC WORKPLACE SURVEILLANCE AND ELECTRONIC PRIVACY – QLD UNIVERSITY OF TECHNOLOGY, Brisbane. 2009.
http://eprints.qut.edu.au/26536/1/James_Watt_Thesis.pdf