Auto WiFi/4G/3G switching - Battery
On my M8, I have a couple of push email accounts, plus your usual array of push notifications from social media and IM apps. Typically, with WiFi on, I consume about 5% per hour of battery (per GSam) - Phone is connected to a LTE network, despite being on WiFi
Now, usually, when im out and about, I have 4G LTE enabled, so I get great speeds. I've noticed, that if I turn LTE off (and put it onto HSPA), my standby battery goes to about 3% per hour.
Given that most of the work day is indoors with WiFi, i'm looking for an app, or a method, for my M8 to switch to 3G WCDMA when its connected onto wifi, and when wifi disconnects, for it to switch to 4G LTE....
Anyone know how I can do this with minimal manual intervention? IFTTT doesnt seem to be able to, and whilst "Intelli3G" looked promising, it requires root, and I'm not rooted for the time being.