Basic Features
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Connection History
Data Usage Reports
Access Dialer Codes from Notifications
Allows Project Fi users to manually switch between networks with provided dialer codes
"Ok Google" support for Dialer codes ("OK Google Start Signal Spy")
Android Wear support for Dialer Codes

Pro Features
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No Ads
Detailed History
- Additional information of network connection history on history cards
- Detailed view for each history card with additional data
Automatic Dialer Codes
- Switch between cellular networks (Project Fi users can switch between networks with ease) with root supported direct switching
- Non-root supported switching (requires Accessibility support)
Advanced Data Usage
- Monitor data usage and prevent data overages with variable date data usage reports
- Sortable by name or MB used
- See data used by carrier
Data Limit
- Monitor data usage with daily data limits to warn you when you use too much data
- Ability to limit data usage when you cross a user-defined threshold
Other Tools
- Android 7.1 App Shortcuts

Signal Spy allows users to be better informed when it comes to their cellular service. It allows you to see signal strength and technology in real time. We can also tell you what LTE band you're using on Sprint and T-Mobile so you can understand what speeds and features to expect. Signal Spy also keeps a history of all of your connections: when you connect and disconnect from WiFi, and what carrier you're using! Pro Users can now see a history of Wi-Fi and Cellular connectivity along with signal strength and location!

For Project Fi customers, users will also be able to better manage their experience by easily switching between carriers with our dialer code shortcuts. Our network switching logging will be extremely useful to show you how often you switch between Sprint and T-Mobile networks. We also have a resources page within the app dedicated to resources that Project Fi users have found helpful with their service. Note though that our app will not automatically switch for you, and that all switch requests will revert after 2 hours. This is a ramification of using the dialer codes and cannot be controlled by Signal Spy.

Have questions, bug reports, or feedback? Send an email to the developers from the about page!

Explanation of Permissions:
Location: In order to determine your LTE band, we need to access information about that tower. Accessing tower information requires the coarse location permission because of the data you can extract from that tower. We also use Location to determine where events took place (you can turn this off in settings)
Phone: In order to use the dialer, which is necessary for the carrier switch codes, we need to have the phone permission
Contact: In order to restore previous purchases on other devices, we need to verify your Google account and confirm add on payments. We don't store your contact information outside of your device

“This app uses Accessibility services.”

Developers: Bryan Gintz, Ziggy Dziegman, Yara Abdallah and Andrew Brookes
Art Contributions: Andrew Carter and Brandon Pence

// Option A //

To download Signal Spy - Signal Strengths! mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download Signal Spy - Signal Strengths! mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download Signal Spy - Signal Strengths! from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Signal Spy - Signal Strengths! in HappyMod App.