- Signal direction
- Signal graph
- Map and radar views of cell towers & WiFi routers
- Detailed signal strength data
- Save data to SD card
- Save wifi access points and maps of their locations by running the speed test
- Option to notify you at loss of signal (entering "deadzones")
- History of signal readings
The simplest tactic to improve your reception is to walk in the direction of your signal. Not foolproof, but worth a shot!
Option to contribute to the OpenSignalMaps.com project: we're TRUE coverage maps of cell phone networks & wifi data points freely available to all.
Thanks to everyone who has contributed translations: Wellington Lima, Gurkenglas, Daniel Dietrich, Aleksandr Autayeu, Evgeny Tverdohlebov,Alessio Capaci, Pierre Reynes, J Basnak, Ricardo Cescon, Simon P., Keruj Amles,
Supports almost all Android devices:
from small screened devices (HTC Wildifre) on 1.5 (Cupcake) up to your flashy Galaxy Nexus on 4.0 (Icecream Sandwich). We also support devices without Google APIs.
Problems? Email us!
- Click the wifi-cells toggle button on the bottom left to see wifi routers
- Use wifi and GPS for best speed and accuracy
- Verizon & Sprint users will see only one connected tower at a time
- Not all towers and wireless routers are in our database. Sorry!
- Moving in the direction of your cell tower will not always improve reception due to interference effects and local geography.
- Data is mainly crowd sourced - wireless and antenna locations are calculated by triangulation. This means they are not exact, and sometimes they may be way off. As more people use this app the data will improve.
- Click on the "i" on the overview screen to see more signal stats - including signal RSSI in ASU and dBm - comprehensive field test mode.
- Export speed test results, cell signal and wifi routers as CSV to SDCard so you can analyse as you wish.
- For GSM, cell tower are identified via cell id and location area code (CID and LAC)
- For CDMA, cell towers are identified via Network ID, Base sub-station ID and system ID (NID, BSSID and SID). CDMA phones include the Droid (II, X, HD, etc.), EVO 4G - all phones on Verizon and Sprint.
- See our website opensignalmaps.com for more detail on using the app and please add your requests for developments.
- For tablets (somde models of Xoom, Asus Transformer and others) that do not have cell radios the app will only work in wifi mode
- For devices that do not have access to google APIs OpenStreetMaps are used
- For the Galaxy S2 there is an issue reading the signal strength, this is a bug and effects all signal apps, however the app does show cell tower location as normal and works in wifi mode perfectly
- This app is developed on a Nexus One, but tested on many phones (I also have a HTC Hero still on 1.5!), let us know any problems. Sorry if we're slow in replying, but we read every email.
We're building trustworthy and comprehensive coverage maps for GSM, CDMA; for 2G, 3G & 4G. We think this is the best signal tool you can find, let us know if you think anything is missing.
Networks we're mapping: Orange, Vodafone, O2, 3, AT&T, Sprint, Verizon, Movistar, Claro. And over a hundred others.