Try Sensorly:
https://play.google.com/store/search?q=sensorly&c=apps
Who's the best carrier for you ?
Sensorly will help you discover who the best carrier is FOR YOU, based on millions of recordings made by our users throughout the world:
- test your carrier's network speed anywhere you are.
- see carrier's 2G, 3G, 4G and WiFi coverage on beautiful maps with street-level accuracy
- compare carrier's coverage and signal quality for any location in the world using our unique 'compare' feature
- report indoor locations with poor coverage using Foursquare's list of locations
- map your neighborhood easily with our non-intrusive data collection (optional)
This app. will also show you everything the phone can tell us about your phone's network connectivity : cell tower identfication or BSSID, signal strength (RSSI), etc. It works for CDMA, GSM, WiFi, Wimax and LTE.
Our information is provided free of charge, we hope you will contribute to the database and map your neighborhood in return (but you don't have to)
Our application is 100% configurable : choose the map to show, enable/disable data collection, automate data collection, send only over Wifi, etc... you have total control.
Sensorly does not collect any personal data, phone number, IMEI and does not even collect the phone's unique identifier (UUID). We do not need it to build aggregate coverage maps !