title: preferred_network_mode values for GWL/LTE ONLY/WCDMA ONLY/GSM using adb
body: <p>I am using below adb commands for changing preferred network mode to GSM where value is 1, Can any one give the values for other modes like 
  - GWL (GSM/WCDMA/LTEONLY)
  - LTE ONLY
  - WCDMA PREFERRED etc </p>
  
  <pre><code>adb root
  adb wait-for-devices
  adb shell sqlite3 /data/data/com.android.providers.settings/databases/settings.db "update global SET value=12 WHERE name='preferred_network_mode'"
  adb shell sqlite3 /data/data/com.android.providers.settings/databases/settings.db "select value FROM secure WHERE name='preferred_network_mode'"
  adb reboot 
  </code></pre>