Android is currently the most popular mobile operating system. Its popularity is increasing day by day. All the new technologies and new features are coming with the passage of time. However, there are many things about Android devices that many of us do not know. I don't know much either. However, there are some things that all Android users need to know about my post today . Not all Android devices offer NFC . NFC is offered on some mid-range and some most high-end smartphones . Although many of us find this feature necessary , we usually do not use this feature much. So when you 're not using NFC , it's best to keep it off. Because having NFC on will cost you a lot of battery. So don't forget to turn off NFC at the end of use. Advanced Wi-Fi settings There are very few Android users who use Advanced Wi-Fi settings. There are many people who have no idea about these settings. If you use WiFi regularly, you need to use these settings to get notifications for new WiFi networks. Many times the signals of the WiFi connections that your device finds are not good , in which case these settings are necessary to avoid weak WiFi connections. You can also find out the MAC address of your device through this settings option. Mobile data / Wi-Fi / battery usage / process stats We often have many complaints about mobile data. As I used so little, how did the data end so quickly !! Go to Settings> Data Usage and you will get the answer to all these questions. You can easily find out which app is consuming the most data. Similarly, if you turn on Show Wi-Fi usage from the menu, you will be able to know how much data you have spent with WiFi. In addition, due to the fact that different apps occupy the RAM of your device, when your device runs slow, you must want to know which apps are occupying your RAM. In this case, a new tip is to go to Settings> About phone and press the Build number option a few times. This will activate the Developer Options menu on your device . Now go to Developer Options> Process Stats and you can easily see which apps are occupying how much RAM of your device. However, I got this option on my device , but not on the Walton E2 . However, check if your device has the option. Location Service So far I have written several posts on the site about battery saving tips. And in all the posts I have written about location service. If you haven't always used Google Maps , Google Now or other third party apps that use location services or GPS , it's best to keep location services and GPS off. Because it will save your battery. Or you can use location service in battery saving mode. Go to settings> Location> Mode and you will get the option. Encrypt phone / SIM card lock Most of the time we use many third party apps to protect Android devices. There is no doubt that there are many good apps for protecting the device. However, all Android devices have some security options. For example, you can encrypt your device with a password if you wish . In this case, you have to give the password every time you turn on the device. If you want to decrypt your device , you need to do a factory reset of your device.