Settings for Messaging app?

G TG T Posts: 9FreedomPop Newbie
I guess I should select Echo cancellation. But how about Adaptive rate control?

Should I select all Codecs? What is Notification listener invocation?

In Network, I tried UPNP, and my phone stopped ringing. So I think we should not select UPNP. I also tried Enable push notifications, but the selection will not stay.
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