1. Test the data your calls use
The test above checks latency, jitter, loss and speed. Run it twice: once with Wi-Fi off, which tests your carrier's mobile data (used by calling apps and Teams/Zoom on the go), and once on Wi-Fi, which is what Wi-Fi Calling uses indoors.
2. Grade your signal
Android settings that affect calls
| Task | Google Pixel | Samsung Galaxy |
|---|---|---|
| Turn on Wi-Fi Calling | Settings → Network & internet → Calls & SMS → choose your carrier → Wi-Fi Calling | Settings → Connections → Wi-Fi Calling |
| See signal strength in dBm | Settings → About phone → SIM status (or Status information) → Signal strength. Many models also open a testing menu when you dial *#*#4636#*#*. | |
| Show your IMEI | Dial *#06# | |
Menu names change between Android versions, manufacturers and carriers. On some carriers (for example AT&T), VoLTE must be on before Wi-Fi Calling appears.
3. Hear a real call
Dial the free test line 804-222-1111 from your Android phone. Press 3 for a live echo test or 4 to record and play back your voice. Try it on cellular and again on Wi-Fi Calling.
Common Android call fixes
- Restart the phone — it re-registers with the network.
- Turn Wi-Fi Calling on if indoor signal is weak.
- Install system and carrier updates.
- Remove the case and test again if signal is marginal; some metal or magnetic cases reduce it.
- Test with a different headset or Bluetooth device off — many "bad call" complaints are a Bluetooth car kit or earbud.
- Still bad in one location? It's coverage, not the phone. See cellular fixes.
Frequently asked questions
How do I test call quality on my Android phone?
Open this page on the phone and run the test with Wi-Fi off and then on. Check signal strength in Settings, About phone, SIM status, and enter it in the signal grader. Then call the free test line 804-222-1111 and use the echo or record-and-playback option to hear how calls actually sound.
How do I turn on Wi-Fi Calling on Android?
On Google Pixel: Settings, Network & internet, Calls & SMS, choose your carrier, then turn on Wi-Fi Calling. On Samsung Galaxy: Settings, Connections, Wi-Fi Calling. Your carrier must support it, and you may be asked for an emergency address.
How do I check my real signal strength on Android?
Go to Settings, About phone, SIM status (or Status information) and look at Signal strength in dBm. On LTE and 5G, −80 dBm or higher is excellent, −90 to −100 is fair, and −100 or lower is poor. Many models also show more detail through the *#*#4636#*#* testing menu.
Why do my calls sound bad on my Android phone?
The most common causes are weak or noisy signal indoors, a poor Wi-Fi connection during Wi-Fi Calling, a Bluetooth headset or car kit, or a blocked microphone. Test on speaker and on the handset with Bluetooth off to rule out the accessory.
Does Android have a built-in call quality test?
Not a universal one. Android shows signal strength in Settings and many models have a hidden testing menu, but there is no standard built-in call test. A web test like this one plus a test call to 804-222-1111 covers it.
Why do Android calls drop in my office?
Building materials block cellular signal, especially metal, concrete and energy-efficient glass. Turn on Wi-Fi Calling, use your business phone system's softphone app over Wi-Fi, or have a certified signal booster installed and registered with your carrier.
Sources & references
- AT&T Device Support — Turning Wi-Fi Calling on (Google Pixel)
- Samsung Support — Turn on Wi-Fi Calling on Galaxy phones
- FCC — Signal boosters consumer guide
- TestCall.com — 804-222-1111 test number
Written by Eric · Reviewed November 2026