Default Xfinity App build.prop edit

The Xfinity app only supports mobile data use on Verizon and all other carriers are forced to use wifi. Can someone explain how I can edit the apk to spoof the app thinking that I am on Verizon and not Sprint? My Galaxy S5 is also not rooted yet so not sure if this can be done via Windows or not and then download the apk that way.
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