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Can you share what are the screen widths for the various devices you mention?
This is what I use.
There are so many different devices with different screen sizes you cannot accomodate every one.
/* 1 Column Grid 0px - 319px */
/* 1 Column Grid 320px - 479px */
/* 2 Column Grid 480px - 759px */
/* 2 Column Grid 760px - 979px */
/* 4 Column Grid 980px - 1199px */
/* 4 Column Grid 1200px - 1599px */
/* 4 Column Grid 1600px - Infinity */
These play nicely on phones, tablets and desktops in both portrait and landscape.
Second personal opinion - I agree with the above but don't be afriad to add more breakpoints when and where your design needs it. If content isn't looking right at 820px then add a breakpoint and fix it.