Short answer: no—SIM card data alone does not give third‑party apps accurate, real‑time location. Legitimate monitoring apps (with the device owner’s consent and proper installation) use GPS, Wi‑Fi, and cell-tower signals, and require the correct OS permissions (e.g., “Always” location access and precise location). Network carriers can estimate location from cell towers, but that data isn’t available to consumer apps. If you want help configuring a legitimate app, share the device model, OS version, app name, and any error messages you’re seeing.