Any way to change Network Mode automatically depending on Mobile Data status? topic

I am facing a rather weird problem. You see I don't use data/3G that much, very less in fact, cause every place I use to go have WiFi, still I keep the network mode (which is found under Settings - More networks - Mobile networks - Network mode) at WCDMA/GSM (auto connect), because without it the H+ drops to E (Edge), which is nonsense basically.
But the problem I am having is if I keep that mode to Auto, I mean WCDMA/GSM, then I am having troubles with SMS Delivery Reports! I mean I am getting the delivery reports very late for whatever reasons! The texts are being delivered instantly, yet the delivery report comes very late with a delayed time stamp on it, which is very weird and very annoying for me as I send a lot of messages. But if I switch the network mode to GSM Only then there is no such problem, the SMS Delivery reports are instant! But then again, as I said, switching to GSM only means no 3G/H+ but Edge only.

So I was wondering if there's an app which will change the network mode automatically depending on Mobile Data staus. I mean if I turn on Mobile Data it would go to that Auto Connect mode or WCDMA/GSM and as soon as I disable Mobile Data it should go to GSM Only mode. Is there any app like that?

Thanks in advance.