SM-G925P Sprint Emergency Calls Only After Upgrade Fixed.

Follow these outlined steps to fix no service/searching/Emergency Calls on Samsung Galaxy S6 Edge Sprint Version(SM-G925P):

Download SM-G925P 5.1.1 Modem and download Odin3, if you already have it, skip and proceed.

1. Open Odin3, choose CP and select SM-G925P Modem.tar file you’ve downloaded and flash.

Once flashing is completed, phone network will be restored.
Note that the above modem works fine with Android 6.0!