Android 4.0 4G toggle

Question

This is for the Verizon LTE version of the Samsung Galaxy Nexus.

I am tasked with writing a tiny app that will effectively disable/enable 4G capability. This can be done

Answer 1

All the other answers are correct that this requires access to Settings.Secure. Take a look at how the phone app handles this setting https://github.com/dzo/packages_apps_phone/blob/master/src/com/android/phone/Use2GOnlyCheckBoxPreference.java

or take a look at the Toggle2G app source: https://github.com/TheMasterBaron/Toggle-2G