OnePlus mobile Issue not responding on media call

Question

Can somebody help me why the simplest code for paragraph is not responding on media call for oneplus phone.

@media only screen and (max-width:479px),only screen and (-webkit-min-device-pixel-ratio: 2.625) {
    .pinfo {
        color:#333333;
        line-height:98%;
        text-align:left;
        font-size:16px;
    }
}