Hi,
First off, I tried to use my phone's calculator this morning, and found out that it doesn't work very well. For example,
45 + 45 - 45 x 45 = should be 2025
But it shows -1935 instead. I don't know why, and I don't know how to setting the calculator at all ( even if it was possible ).
Second, I checked that Xperia ZR should have Android 4.2 update, but it doesn't show on my Phone update or even on computer. How do I upgrade it then?
Thanks.
