Xorware 2G/3G/4G Interface PRO

Sale has ended but you can still get this app.

Official Description

Esta aplicación permitirá intercambiar automática e inteligentemente entre los modos de red 2G/3G/4G para conseguir un mayor ahorro de batería.

REQUISITOS ANTES DE ADQUIRIR LA APLICACIÓN:
Es necesario ser root y tener instalado Xposed Framework.

FOROS, INSTRUCCIONES, ETC.:
http://www.htcmania.com/showthread.php?t=750308
http://forum.xda-developers.com/showthread.php?t=2619068

This application will automatically and intelligently switch between 2G/3G/4G network modes for increased battery savings.

PURCHASE REQUIREMENTS BEFORE APPLYING:
You need to be root and have Xposed Framework installed.

FORUMS, INSTRUCTIONS, ETC.:
http://www.htcmania.com/showthread.php?t=750308
http://forum.xda-developers.com/showthread.php?t=2619068