Internet providers also use the MAC address to connect you and authenticate your connection with the device with the help of Mac address.The privacy can also be compromised as it is not safe to access the public network and they might get you Mac address easily.There are many networks where there are an IP based address and the moment you go offline the hacker can see your data and use your Mac address imitating you and can access your personal details. One of the most cited reason is the privacy.There might be many answers to this question but the frequent answer I have listed here on where you will need to change your MAC address android. What is the need to Change Mac Address In Android? Many workplaces or institute use this for the authentication of your device to be connected to their internet of Wi-Fi. It is used to identify a particular device on Internet connection and local area network. This is nothing but a unique 12 character identifier associated with any hardware you possess. 3 Steps To Change Mac Address In Android Phone | Spoof mac address Android.