Ndno,
The big different between 3.d and 4.a is that 4.a attempt to calculate Se where as it used to be fixed to .007. I'm not sure what it should be for your phone. I know that it is ~.0013 on rhod300, and .0075 on rhod210. If you can get lots of logs, and find that different combinations give you some consistent number, then we will know what it should be with some confidence. Other than that it kind of requires a multimeter
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Editing the conf is a fine thing to do if your so inclined.