To instantly resolve connectivity drops on your AliveCor KardiaMobile 6L, toggle your smartphone’s Bluetooth off and on, and lightly moisten your fingertips and the skin on your left ankle (or knee) to ensure a strong physical connection.
If your KardiaMobile 6L continues to disconnect during a reading, work through these quick troubleshooting steps:
### 1. Optimize Physical Electrode Contact
The KardiaMobile 6L requires three points of steady, conductive contact to maintain a connection.
* **Moisten your skin:** Dry skin is the #1 cause of signal drops. Apply a drop of water or alcohol-free lotion to your thumbs and the spot on your left leg (ankle or knee) where the bottom electrode rests.
* **Clean the electrodes:** Wipe the three metal electrodes with a damp, soapy cloth or alcohol wipe to remove oils and dirt, then dry with a soft cloth.
* **Apply steady pressure:** Hold the device firmly but without squeezing too hard, which can cause muscle tension interference.
### 2. Resolve Bluetooth and App Glitches
The 6L model relies entirely on Bluetooth Low Energy (BLE) to transmit data to your phone.
* **Do not pair via phone settings:** The KardiaMobile 6L connects directly through the Kardia app. If you paired it in your phone’s system Bluetooth menu, unpair/forget it, and connect only inside the Kardia app.
* **Restart the Kardia App:** Force-close the app and reopen it to refresh the connection.
* **Re-enable Bluetooth permissions:** Go to your phone’s Settings > Kardia App and ensure Bluetooth sharing/permissions are enabled.
### 3. Eliminate Wireless Interference
External signals can disrupt the weak Bluetooth signal between the device and your phone.
* **Move away from electronics:** Step away from computers, Wi-Fi routers, microwaves, and fluorescent lighting.
* **Disconnect other Bluetooth devices:** Temporarily disconnect smartwatches, wireless earbuds, or hearing aids, as they can crowd your phone’s Bluetooth bandwidth.
* **Keep devices close:** Maintain a distance of less than two feet between your KardiaMobile 6L and your smartphone during the reading.
### 4. Check the Battery Power
Weak batteries cause the Bluetooth signal to frequently drop and reconnect.
* **Replace the battery:** If you have used the device for over a year, or if you experience constant drops, slide open the battery compartment on the back and replace the CR2016 coin cell battery.
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