CellMapper

CellMapper.net

Contains adsIn-app purchases

About this app

CellMapper displays advanced 2G/3G/4G/5G (NSA and SA) cellular network information and can also record this data to allow you to contribute to our crowd-sourced coverage maps.

CellMapper works on both tablets and phones running Android 4.0 or higher.

Features
- Displays low level cellular network information data along with frequency band calculations (for some providers)
- Reads cellular frequencies and bandwidths on supported Android 7.0+ devices
- Displays a map of both coverage and individual tower sector coverage and bands
- Supports Dual SIMs devices
- Frequency calculator (GSM, iDEN, CDMA, UMTS, LTE, and NR)

Note: The data on the site and within the app is generated shortly after it is uploaded, it may take up to a few days to appear.

Currently supported networks:
- GSM
- UMTS
- CDMA
- LTE
- NR


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Visit our our website cellmapper.net.

Permissions

Why does CellMapper need so many permissions?
"make and manage phone calls" - This is required to get low level network data from your device
"access to device location" - In order to map and contribute, we will need to know where the data was recorded from your device.

Older versions of Android:
android.permission.ACCESS_COARSE_LOCATION - To get CellID information
android.permission.ACCESS_FINE_LOCATION - To get GPS location
android.permission.ACCESS_NETWORK_STATE - To get Cellular network information
android.permission.INTERNET - To connect to server to download map data / upload data
android.permission.READ_EXTERNAL_STORAGE - To write external CSV file if no internet connection
android.permission.READ_LOGS - To read Samsung Field Test Mode data on Android 4.1 and earlier (despite what the dialog says, the app cannot read your browsing history unless your browser write it to the system log)
android.permission.READ_PHONE_STATE - To read info about airplane mode / network settings
android.permission.RECEIVE_BOOT_COMPLETED - To start at boot time (if enabled)
android.permission.VIBRATE - To vibrate on CellID change (if enabled)
android.permission.WAKE_LOCK - For phones that do not support 4.2+ CellID Support, to ensure they report correct data
android.permission.WRITE_EXTERNAL_STORAGE - To write external CSV file and debug report

Ratings and reviews

The recorded online data is good. But my instance of the app silently stopped recording cell tower information. I'd be interested in paying for premium if I could trust that it'd even with. As it is it seemingly didn't record anything during a recent mapping event even though app UI was running and "recording". I have been able to confirm some points uploaded and processed to the map so the app just seems to just be unreliable and it. Pixel 5 phone.

Free (cheap to stop unobtrusive ad), functional (don't know of another app to find cell towers with), and online they offer deep information like how to unlock all radios on Samsung phones (versus only what your current carrier can use). Not sure if it can crowd source cellular quality for all providers, but I'd hope so. I'm still learning how it works and how to help (record data is needed, can't just run it).

Erratic, Lost All Towers in My Area after a Couple Weeks At first it showed all the towers including DAS in my area, which bands they use, and which one I was connecting too. That's useful, so I created an account and subscribed to it, then started driving around in Car Mode to fill in the blanks spots in the map for data points. // Map issue fixed! Stars upped to 4!

What's new

- Bug/crash fixes
- Android 13 optimizations
- Added support for reading bandwidth of component carriers on supported devices
- Added option to use Google Pay to subscribe to premium