5G SA Events — Sector Logging & Signal Mapping
By the CellInfo Dev Team
Track every 5G Standalone sector you connect to — automatically. The 5G SA Events tool logs signal data in the background while CellInfo is running, building a comprehensive picture of 5G SA coverage in your area over time.
How It Works
Once enabled, CellInfo silently monitors your 5G SA connection and logs each unique sector it detects. For every sector, it records:
- Best signal — the strongest reading you’ve ever had from that sector, with GPS location and timestamp
- Worst signal — the weakest reading, useful for identifying coverage edges
- Last seen — the most recent connection to that sector
All logging happens automatically in the background. You don’t need to press anything — just keep CellInfo running as you go about your day.
Setting Up
- Open CellInfo and go to Settings
- Scroll to 5G SA Logging
- Toggle Enable 5G SA Logging on
- That’s it — CellInfo will now log 5G SA sectors whenever you’re connected
Note: You need to be connected to a 5G Standalone network for events to be logged. 5G NSA (Non-Standalone) connections are handled separately by the Mast Names feature.
Viewing Your Logged Sectors
Open the 5G Lab tab to see all your logged 5G SA events. Each entry shows:
- Sector identity — MCC-MNC, NCI, gNB ID, PCI, TAC, and Band
- Signal readings — Best, Worst, and Last RSRP values in dBm
- GPS coordinates — Where each signal reading was recorded
- Timestamps — When each reading was captured
Signal Location Map
Each logged sector can be viewed on an interactive map showing exactly where you recorded the strongest and weakest signals.
- 🟢 Green marker — Location where you recorded the strongest signal
- 🔴 Red marker — Location where you recorded the weakest signal
Tap any marker to see full details including signal strength, band, and timestamp.
Export Map to Gallery
You can save the signal map as a PNG image directly to your phone’s gallery:
- Open a sector’s detail view
- Tap Show Tower on Map
- Once the map loads, tap Export Map to Gallery
The exported image includes a colour key and attribution — ready for sharing in reports or presentations.
Capacity & Storage
- Up to 500 unique sectors can be stored
- Events are stored in a dedicated database for fast loading — no lag even with hundreds of entries
- Older events can be cleared individually or all at once if you need to start fresh
Sector Identity
Each 5G SA sector is uniquely identified by six components:
| Field | Example | Purpose |
|---|---|---|
| MCC | 234 | Mobile Country Code |
| MNC | 10 | Mobile Network Code (operator) |
| Band | n28 | 5G frequency band |
| NCI | 231735821 | NR Cell Identity (full 36-bit) |
| PCI | 240 | Physical Cell ID |
| TAC | 149792 | Tracking Area Code |
This ensures that different sectors on the same tower, or the same sector on different bands, are tracked separately for maximum accuracy.
Export & Import
Exporting Your Data
You can export all logged 5G SA events as a JSON file for backup or external analysis:
- Open the 5G Lab tab
- Tap the Export button
- Choose where to save the file
The exported JSON includes all sector identities, signal readings, GPS coordinates, and timestamps.
Importing Data
To restore previously exported data or merge data from another device:
- Open the 5G Lab tab
- Tap the Import button
- Select your JSON file
- Choose Add to existing (merge) or Replace all (overwrite)
Import automatically deduplicates entries — if a sector already exists, it merges the best/worst readings intelligently.
Tips for Best Results
- Keep CellInfo running while you travel — the more you move, the more sectors get logged
- Enable GPS for accurate location recording with each signal reading
- Check periodically — open the 5G Lab to see how many sectors you’ve collected
- Export regularly — back up your data before clearing or reinstalling
- Use with Mast Names — the Mast Names feature tracks LTE and 5G NSA towers, while 5G SA Events focuses specifically on Standalone sectors
Requirements
- Device with 5G Standalone hardware
- Carrier with active 5G SA deployment
- Android 12+ recommended
- GPS enabled for location recording
- CellInfo V0.13.03.010 or later (500 sector capacity)