IT Services Circle

Aug 29, 2025 · Mobile Development

Why iPhone Status Bars Are Showing Unexpected Ads – The PLMN & NITZ Explanation

Users of China Mobile have reported that their phone status bars suddenly display promotional messages instead of the usual carrier name, a phenomenon tied to PLMN codes and NITZ broadcasts, with carrier‑mandated custom logos and messages raising compliance and user‑experience concerns across iOS and Android devices.