Automatic data disconnect or delayed incoming answer

[master4g]

I use the diamond tweak on my diamond to set the "Disconnect data" after 2 minutes settings so I can save on battery

I was having a problem that whenever Im on data, like running WMwifirouter and someone calls me, no matter how many times i press accept on the touch screen or the button, it lags to a point where the person calling already hangs up. So i searched and i found a reg change to make to make that disappear by changing one of the registry settings to #777

but when i did this, I guess it disabled that "automatic data disconnect that "diamond tweak" set.

Is there is a way I can automatically disconnect data after few minutes and also have this #777 regkey so the delay lag goes away?

(also, do you guys think the automatic disconnect makes a difference on the battery life?)