This is a Unknown Status Filled icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,000 icons, all in the same style and quality.
It's a logo of a circle in the middle and then on the right and left two smaller circles on each side in a straight line and on top and bottom one smaller circle in a straight line to form sort of an equal sideways cross look to it.
Related to Unknown Status Filled Icon
Related icons are the icons with matching tags, as well as all messaging icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors