**Why Does My KardiaMobile Fail to Connect?**
If your KardiaMobile fails to connect, immediately turn your smartphone’s volume to maximum, unplug any headphones, disconnect Bluetooth earbuds, and ensure the Kardia app has permission to access your phone’s microphone.
Depending on your specific model, here is why your device is failing to connect and how to fix it:
### Why the Standard KardiaMobile (Single-Lead) Fails to Connect
The standard KardiaMobile does not use Bluetooth; it uses high-frequency ultrasound (sound waves) to transmit data to your phone’s microphone. It will fail to connect if:
* **Microphone permissions are denied:** Go to your phone’s Settings > Kardia App > and toggle **Microphone Access** to ON.
* **The microphone is intercepted:** Wired headphones, Bluetooth earbuds, or external speakers are active, which prevents the app from using the phone’s built-in microphone.
* **Physical blockage:** A thick phone case is covering your phone’s microphone, or you are holding the KardiaMobile too far away from the phone (keep it within 6 inches).
* **Ambient noise interference:** Loud televisions, fans, air conditioners, or running water are disrupting the high-frequency sound signal.
### Why the KardiaMobile 6L Fails to Connect
The KardiaMobile 6L connects via Bluetooth. It will fail to connect if:
* **Bluetooth is turned off:** Ensure Bluetooth is enabled in your phone’s settings (Note: Do *not* try to pair the device through your phone’s native Bluetooth menu; the Kardia app connects to it automatically).
* **Location Services are disabled:** Both Android and iOS require **Location Services** to be turned ON for the Kardia app to utilize Bluetooth pairing.
* **Signal interference:** Other nearby active Bluetooth devices (like smartwatches or fitness trackers) are interfering with the connection.
### Hardware & Physical Failures (All Models)
Your device may also fail to connect due to physical barriers:
* **The battery is dead:** If your KardiaMobile is over a year old, the CR2016 coin-cell battery is likely dead. Slide open the battery compartment on the back to replace it.
* **Dry skin/poor contact:** The device cannot establish a connection if your skin is too dry. Wipe your fingers with a damp cloth or use a drop of water/hand sanitizer before touching the electrodes.
* **Dirty electrodes:** Build-up of body oils or dirt on the metal plates blocks the connection. Wipe the electrodes down with an alcohol-based sanitizer.
Recommended Fix
[If your KardiaMobile fails to connect, immediately turn your smartphone’s volume to maximum, unplug any headphones, disconnect Bluetooth earbuds, and ensure the Kardia app has permission to access your phone’s microphone.
Depending on your specific model,Your device may also fail to connect due to physical barriers.If DIY guide does not help to fix the problem,you may want to replace or purchase a new product ]
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