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Learn the basics about securing your Android device


Access to your phone

Enable Lock SIM card

Enable Lock SIM card, found under Settings -> Personal -> Security -> Set up SIM card lock.

Enable Lock SIM card

This will mean that you must enter a PIN number in order to unlock your SIM card each time your phone is switched on, with out the PIN no phone calls can be made.

Set up a Screen lock

Set up a Screen Lock, found under Settings -> Personal -> Security -> Screen Lock, which will ensure that a code, pattern or password needs to be entered in order to unlock the screen once it has been locked.

Set up a Screen Lock

We recommended using the PIN or Password option, as these are not restricted by length. Refer to the Passwords lesson to learn how to create a strong password. <br.

Set security lock timer

Set the security lock timer, which will automatically lock your phone after a specified time.

Set security lock timer

You can specify a value which suits you, depending on how regularly you are willing to have to unlock your phone.

Device encryption

Turn on

If your device uses Android version 4.0 or newer, you should turn on device encryption. This can be done in Settings -> Personal -> Security -> Encryption.

Set a screen lock password

Before you can utilise device encryption, however, you will be required to set a screen lock password.
Note: Before starting the encryption process, ensure the phone is fully charged and plugged into a power source.

Network settings

Turn off Wi-Fi and Bluetooth by default.

Ensure that Tethering and Portable Hotspots, under Wireless and Network Settings, are switched off when not in use. Settings -> Wireless & Networks -> More -> Tethering & Mobile hotspot.

Manually switch off Near Field Communication

If your device supports Near Field Communication (NFC), this will be switched on by default, and so must be switched off manually.

Location settings

Turn off Wireless and GPS location

Switch off Wireless and GPS location (under Location Services) and mobile data (this can be found under Settings -> Personal -> Location). Only turn on location settings if you need them.

Importance of turning off

Turning off Wireless and GPS location reduces the risk of location tracking, saves battery power, and reduces unwanted data streams initiated by applications running in the background or remotely by your mobile carrier.

Caller identity

If you want to hide your caller-ID, go to Phone Dialler -> settings -> Additional Settings -> Caller ID -> hide number.

Software updates

Update regularly

To ensure that you phone remains secure, it is strongly recommended to keep your software updated. There are two types of updates that need to be checked:

Operating system

The phone operating system: go to: settings -> About phone -> updates -> check for updates.

Apps you have installed

Apps you have installed: Open the Play store app, from the side menu select My Apps.
Note: When updating your phones software it is important to do it from a trusted location such as your internet connection at home instead of somewhere like an internet cafe or coffee shop.


  • en/topics/tool-2-signal/0-getting-started/1-1-intro.md: Using the Signal app for secure messaging
  • en/topics/understand-4-digisec/4-secure-communications/1-1-intro.md: Learn to communicate securely
  • en/topics/understand-4-digisec/1-encryption/1-1-intro.md: Basics of encryption

See also: