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Wifi Strength Alert icon

<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 3C7.8 3 3.7 4.4 .4 7C4.3 11.8 8.2 16.7 12 21.5C14.3 18.6 16.7 15.7 19 12.8V9.6L12 18.3L3.3 7.4C5.9 5.8 8.9 5 12 5C15.1 5 18.1 5.9 20.7 7.4L20.3 8H22.9C23.2 7.7 23.4 7.3 23.7 7C20.3 4.4 16.2 3 12 3M21 10V16H23V10M21 18V20H23V18"/></svg>