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  Change SIM PIN: Change the PIN used to access the 
nano-SIM card. 
  NOTE: 
Put all your confidential passwords in a safe place for future 
use. If you enter the wrong SIM PIN more times than 
allowed, your nano-SIM card will be locked and you cannot 
access the mobile phone network. Contact your operator for 
a PIN Unlock Key (PUK) to restore the nano-SIM card. 
  Encryption & credentials: Check the encryption status of 
your phone and set the credential storage options. 
  Trust agents: View or deactivate trust agents. 
  App pinning: Pin an app's screen to keep it in view until you 
unpin it. This feature can be used, for example, to let a 
trusted friend play a specific game. See Protecting Your 
Phone With App Pinning. 
Apps 
Default Apps 
Open Settings > Apps > Default apps to select the default app 
for web browsing, phone calling, messaging, etc. Touch 
Opening links to set Instant apps options, or touch an installed 
app to check its supported links and set whether to open the 
links in the app, and clear the app’s defaults. 
access options of apps.