Android allows you to encrypt all the data on your de vice. You'll need a password or PIN each time the device is turned on to decode all the data. It may seem tiresome but if the phone gets into the wrong hands, there's no way to access the data without a password or PIN. It can be activated through the Android device's Security Settings within your phone. Apps like applock, document locker (Android) and Signal (iOS) can also be used to protect apps and files.
Do not use any unknown Wi-Fi networks on your smartphone. Instead, invest in a good data pack from your mobile network service provider. The cost of a data pack may be high, but at least you are safer using your own network to manage your bank accounts than an unsafe free Wi-Fi.
Both Google play and Apple App stores have verified and scanned apps/games on them. You can access these with your smartphone and download any app safely. There are plenty of websites and mailers, which ask you to download an app from an unknown web link. Don't. If the app is not available on the app stores, do not download and install it.
If you browse websites and download content from the net to your smartphone, install an antivirus app on your mobile. There are plenty of free anti-virus apps available, like AVG Free and Avast, however, we recommend you spend a small amount and buy yourself Norton or Kaspersky Android antivirus app. These will keep your mobile browsers safe from viruses and tell you which sites are safe to browse.
Keep your smartphone's software and apps up-to-date. Under most circumstances software updates come out because the company or app makers have found a security flaw and want to plug it. It is very important that you keep your smartphone's OS and apps updated. Each time there is an OS App update the Google and Apple app stores intimate you (unless you have stopped notifications in phone settings), our recommendation is to connect to a safe Wi-Fi and update them.
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Frequently used country codes in phone models: GL=Global, CN=China, IN=India, US=USA, JP=Japan, EU=Europe (Euro), SG=Singapore, HK=Hong Kong.