Invalid SIM Card Icon - Visual Indicator for Network or Service Restrictions #3764779 (License: Personal Use)

The image depicts a stylized SIM card in bright red, symbolizing an error or warning state, with a large yellow Chinese character “非” (fēi), meaning “not,” “non-,” or “invalid,” centered on its surface. The design follows standard SIM cutout geometry, including the notched corner and contact pad layout, but uses bold color contrast to emphasize a failure condition-common in mobile OS interfaces or carrier portals when a SIM is barred, unprovisioned, or region-locked. Its simplicity ensures immediate recognition across language barriers despite the use of a Chinese glyph.

This icon is typically used in mobile operating systems (e.g., Android lock screens or settings), telecom provider portals, or device diagnostics tools to indicate SIM-related errors such as “No SIM,” “Invalid SIM,” or “Service Not Available.” It matches user intent when troubleshooting connectivity issues or understanding why a phone cannot register on a network.