Melrose Networks

Cell Locator

Position from mobile network signals — no GNSS required. Gauge the estimate against GPS when available.

Requires Android 12 or newer

LTE & 5G NR Accuracy gauge Map & navigation Learn mode

Scan on your phone
to open in Google Play

Estimates position from the cells your phone already hears — serving and neighbours, signal strength and timing advance — matched to a reference survey. Accuracy is typically in the low hundreds of metres where surveyed, with an honest accuracy radius and confidence on every fix.

In normal use only cell measurements are sent; GNSS stays on-device unless you enable Learn mode. Privacy notice.

Installing

1. On your Android phone, tap Get it on Google Play above (or scan the QR code) to open the listing.
2. Tap Install in the Play Store, then open Cell Locator.
3. Grant Location and Phone permissions. Choose Precise location and, for background sampling, Allow all the time.

Using it

1. Tap Start. Samples every 15 s (change in Settings).
2. The gauge shows error vs GNSS (when available), with the estimate’s confidence top-right.
3. The cell table lists serving (S) and neighbour cells.
4. Settings → Show map plots GNSS (blue) and the cell estimate (red).
5. Long-press the map (or enter a destination in Settings) for north-up compass navigation from the cell fix — area guidance, not turn-by-turn.
6. Optional Learn mode sends GNSS with each sample so the server can grow the survey (off by default; needs permission).

Pre-configured for cellpos.melrosenetworks.com. Coverage follows the reference survey. Law enforcement / defence may request geographic exclusions via support@melrosenetworks.com with bounding coordinates.