SignalCheck Pro

In-app purchases
883 reviews
Content rating
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About this app

SignalCheck allows users to check the true signal strength and details about their connections. The standard Android signal bars and connection indicators are often inaccurate; SignalCheck shows you true detailed signal information about all of your device's connections, including 5G-NR, LTE (4G), 1xRTT CDMA, EV-DO / eHRPD, HSPA, HSDPA, HSPA+, HSDPA, HSUPA, and other GSM / WCDMA technologies. Data about your current Wi-Fi connection is also displayed, including signal strength, SSID, link speed, and IP address.

Support for dual-SIM devices is in development, coming soon.

Special thanks to S4GRU for their tremendous support of SignalCheck from the beginning! Visit for discussions about T-Mobile network upgrades, as well as talk about devices and other mobile networks. There is a lengthy SignalCheck forum discussion thread as well.

SignalCheck will display all available information the device is reporting, including details about NR and LTE connections. SignalCheck was one of the first (if not THE first) Android apps to provide detailed LTE information to users. NR and LTE band and frequency information is available on compatible Android 7+ devices. LTE band information is also available on older devices connected to major US providers. Root access adds LTE frequency info on older devices.

SignalCheck also displays the current connection type along with the carrier name for each connection, even while roaming.

One of the best features of SignalCheck Pro are the notification icon(s). A user-customizable icon shows your data connection strength in the notification area at the top of the screen, and more details can be seen in the pulldown menu. Your signal strength is always at the top of the screen along with your other icons.. no need to open the app to check your connections. The icons are customizable, showing signal bars, connection type, digital signal strength in dBm, or connection type with signal strength. A secondary icon can be enabled to always display the 1xRTT signal for CDMA users. All of this is customizable from within the app!

SignalCheck Pro can also notify the user with optional audio, visual, and/or vibrating alerts when user-defined events occur, such as connections to particular NR or LTE bands, complete signal loss, or site pattern matching.

"Neighbor" cells are displayed that are in range of your device, but you are not currently connected to.

Users can save a log of connected sites, and enter a "note" for each site that will be displayed in the app (ie "Springfield High School Tower"). Notes also display on neighbor cells.

Other features include the ability to automatically keep the screen on while SignalCheck Pro is in the foreground, display of your base station location (CDMA 1X site/sector location) street address and instantly show it in your favorite mapping app by tapping on it, and a home screen widget that shows current connection type and real-time signal strengths. Each widget field is color-coded so signal information can be checked with a quick glance.

A feature to quickly reset your data connections from within the app is available, but your device MUST be "rooted" for this to work on Android 4.2 and up. This feature does not work on non-rooted devices.

The following permissions MUST be granted to SignalCheck in order for the app to operate properly. Denying any of these permissions will result in limited app functionality due to Android security policies:
LOCATION (required to obtain mobile and Wi-Fi connection information, and ability to log location information; must select "Allow all the time" to permit background access, for proper display of notification icon and logging when app is in the background)
PHONE (required to obtain mobile connection information)

Feedback is always welcome, both positive and negative. Improvements to the app are always in the works!
Updated on
Feb 17, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Personal info, and App info and performance
Data is encrypted in transit
Data can’t be deleted
883 reviews
Matt Qualls
July 28, 2022
Great app. Great for adding notes to your PCI numbers so that you have a good idea of which towers you're seeing when you're traveling. Anyways, I bought the Pro version to support a well made app that helps you visualize what's going on around you. I USB tether at home to my computer. This is the quickest way to find out if I am on the LTE 700 MHz B12 band or if I'm on the LTE 1900 MHz B2 band. Currently, B2 pings great and downloads faster. I see many other bands elsewhere. Fun app!
2 people found this review helpful
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Tom Senpai
July 12, 2022
I like how there's plenty of info for LTE/5G signals that your phone is connected to as well as connections nearby and how quickly it updates that info. However, I think there could be a bug in the app because as of a few weeks ago I noticed new bands showing up as 5G NR 7 and NR 38 for 2500 MHz, 2600 MHz. Seems unlikely since I'm on the T-Mobile network and the only band in that range would be n41 / B41 as far as I know. I really enjoy the app and hope it gets future updates and bug fixes.
6 people found this review helpful
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Blue Line Computing
October 26, 2022
Thanks for the rating Tom! The n7 and n38 displays are an Android bug; you are connected to n41 if you are on T-Mobile. I am working on implementing a workaround in the app, but a "+1" on the Android Issue Tracker it will help attract attention for it to be properly fixed at the OS level:
A Google user
December 1, 2019
Giving this app two stars because the latest update broke it. It says I have no Mobile Connection, and thus provides no data for my mobile connection, which is actually quite good. WiFi shows connected but it also says the SSID is unknown. I submitted a report at the app's web site. I have received no response yet, but it's only been a couple of hours. EDIT: I just received a response from Blue Line Computing. Evidently, a fix for this issue is rolling out, version 4.551, so I've updated my rating to 5 stars.
6 people found this review helpful
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What's new

Dozens of bugfixes and improvements, including improved 5G-NR and LTE cell identification, 5G-NR status bar icons, improved logging, and more.
See full changelog here: