[Q] App to toggle 2g

Is there an app that toggles 3g to 2g everytime I connect to a wifi and toggles back to 3g or even 4g if I disconnect? I searched google and xda but everything I found is not what I search or incompatible with lollipop

Thanks in advance:)

Flatric

from xda-developers http://ift.tt/1aoTz3g

via IFTTT