Need mobile friendly theme for MyBB

I do not know how to make my forum mobile friendly even I have tried putting
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@media (min-width:320px) and (max-width:1024px)
{

scc here

}
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Did not work. Also looked for some plugin Gomobile is not available and others are not updated for MyBB 1.8.x

Here on MySkins premium themes have mobile friendly view but not with free themes. Zoom in and zoom out is not today people choice.