Network Intelligence & Private Cell Detection
By the CellInfo Dev Team | Published: 4th June 2026
📶 NEW: WiFi Diagnostics Tab
A dedicated WiFi analyser built for network engineers — right inside CellInfo. See everything about your WiFi connection at a glance, diagnose coverage issues, and understand how WiFi and cellular work together on your device.
- Full Radio Details: WiFi standard (4/5/6/6E/7), frequency band, channel, channel width (up to 320 MHz for WiFi 7), signal strength with quality rating, and separate RX/TX link speeds.
- Nearby AP Scanner: See every WiFi network your device can detect — sorted by signal strength, with your connected AP highlighted. Tap the scan button to refresh.
- Channel Congestion Map: Visual bar chart showing how many access points are on each channel across 2.4 GHz and 5 GHz bands. Colour-coded from green (free) to red (congested) with a recommended best channel.
- WiFi Calling (VoWiFi) Status: See whether your voice calls route over WiFi or cellular. Shows registration state, domain (Home/Roaming), and voice path — so you know if your calls are using WiFi Calling or falling back to the mobile network.
- Handover Tracking: Monitors when your phone switches between WiFi and cellular in real-time. Shows each transition with timestamp, signal strength at the moment of switch, and reason. Helps diagnose unstable connections where your phone keeps bouncing between networks.
🏠 NEW: Private Cell Detection
Running your own LTE tower? CellInfo now automatically recognises when you’re connected to a private or test network — no configuration required.
- Automatic Recognition: Cells using test PLMNs (MCC 001, 999) and US CBRS private allocations are identified the moment you connect.
- Clear Indicator: A “Private Cell (Test Network)” label appears on the Network tab so you always know whether you’re on your own infrastructure or a public macro tower.
- CSG Support: Carrier-deployed femtocells that broadcast formal Closed Subscriber Group info are also detected with their CSG identity.
📊 NEW: Smarter Network Insights
New intelligence across the app helps you understand your connection quality at a glance — without running a speed test.
- Channel Congestion: See how busy your cell is, derived from signal measurements. Shown as a percentage with colour coding (Low/Moderate/High/Very High) on the Cell Info tab.
- Handover Rate & Stability: The Stats tab now tracks how often your phone switches towers, your average time on each cell, and an overall stability rating from Excellent to Poor. A high handover rate while driving is normal — what matters is whether you’re stable when stationary.
- Data Activity Direction: The Live Data Rate card now shows whether data is actively flowing and in which direction — Receiving, Transmitting, or Bidirectional.
- Temporarily Free Data: Detects when your carrier offers promotional unmetered windows and shows “Temporarily Free” instead of “Metered” on the Connection Health card.
📶 IMPROVED: Network Tab Enhancements
- Registered Network Name: See the actual network you’re attached to — especially useful when roaming abroad where the visited network differs from your home carrier.
- Stacked CA Bands: Carrier Aggregation now displays bands vertically with individual bandwidth per component carrier — much easier to read on narrow screens.
- Enterprise Slice: Corporate users on an enterprise network slice with priority QoS will see it highlighted automatically.
- VoLTE/VoNR Call State: During voice calls, confirms whether you’re using VoLTE, VoNR, or circuit-switched fallback — so you know if your call is HD or not. This only appears while a call is active and hides when idle.
🩺 NEW: Connection Health & Live Data
These features were developed alongside this release and appear for the first time in this public version.
- Connection Health Card: Shows whether your internet is genuinely working — not just connected. Detects captive portals, shows DNS servers, metered status, and suspended state.
- Device & Service Status: See dual-SIM modem capability, mobile data on/off, and a clear In Service / No Service badge per SIM.
- Live Data Rate: Real-time download and upload speeds updated every second, with arrows that glow green when data is flowing.
- Collapsible Cards: Every card on the Network tab can be collapsed. Your layout is remembered and included in Settings Backup.
📱 FIXED: Foldable Device Support
- No More Restarts on Fold/Unfold: Switching between the inner and outer display on foldable devices (Pixel Fold, Galaxy Z Fold) no longer restarts the app. Your signal graph, logging session, and current tab stay exactly where you left them.
📍 Where to Find Everything
| Feature | Location |
|---|---|
| WiFi Diagnostics (full tab) | WiFi tab — always visible in navigation |
| Nearby AP scan + Channel Map | WiFi tab — second and third cards |
| WiFi Calling (VoWiFi) status | WiFi tab — fourth card |
| WiFi↔Cellular handovers | WiFi tab — fifth card |
| Private Cell indicator | Network tab — below Band row |
| Registered Network Name | Network tab — below MCC-MNC |
| VoLTE/VoNR Call State | Network tab — only visible during calls |
| Channel Congestion (cellular) | Cell Info tab — after VoLTE Support |
| Handover Rate & Stability | Stats tab — per-SIM card |
| Data Activity Direction | Network tab — Live Data Rate card |
| Connection Health | Network tab — after SIM cards |
💡 Good to Know
- WiFi Diagnostics works best with location permission granted — this allows AP scanning and BSSID display. Without it, you still see connection details but not nearby networks.
- Channel Congestion on the WiFi tab shows WiFi channel congestion (how many APs per channel). The congestion on Cell Info tab shows cellular loading (different metric, same concept).
- WiFi Calling status tells you whether your voice calls go over WiFi. If you use WiFi Calling at home, you can verify it’s actually registered and active rather than guessing.
- Handover tracking is session-based — it tracks transitions while the app is running. Walk between your WiFi coverage and cellular to see transitions logged in real-time.
- Private Cell detection works for anyone running their own tower with Open5GS, srsRAN, Amarisoft, Magma, or similar — no special tower configuration needed.
- WiFi tab is always visible — when not connected to WiFi, it shows a friendly “Connect to WiFi to see diagnostics” placeholder rather than disappearing.
Your phone connects to both WiFi and cellular. Now you can finally see how they work together — handovers, voice paths, and coverage gaps, all in one app. Built for network engineers, private LTE operators, and anyone who wants to truly understand their connection.
Thanks to the growing CellInfo community for the feature requests that shaped this release