Wireless Body Area Network in recent years has received significant attention, due to their market potential to reduce the healthcare cost as well as load of medical professionals, resulting in higher efficiency. This paper addresses the available wireless body area network prototypes and the issues related to hardware implementations, software and wireless protocols and how smart phones can be used as full featured portable computer in providing healthcare services. These systems are comprised

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... of various types of small physiological sensors ie, ECG, SpO2 attached to the human body for measuring the physiological parameters and transmit them to remote devices.