how to change preferred network type over adb android?

Question

How can I change the preferred network type with ADB?

Example: set Use only GSM, use only WCDMA, use only LTE or automatic.

Answer 1

This is working for my devices:

adb shell sqlite3 /data/data/com.android.providers.settings/databases/settings.db "update global SET value = 1 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 shell settings put global airplane_mode_on 1
adb shell am broadcast -a android.intent.action.AIRPLANE_MODE --ez state true
sleep 5;
adb shell settings put global airplane_mode_on 0
adb shell am broadcast -a android.intent.action.AIRPLANE_MODE --ez state false