If you own a Recon LT avalanche transceiver from Black Diamond, you should take it out of service immediately and update the firmware. There are two ways to do this:
Download the Pieps app for iOS or Android devices, connect the device via Bluetooth and then follow the instructions on the screen.
Send the device to the Black Diamond Service Centre to have the update carried out free of charge (including shipping costs)
If desired, Black Diamond also offers a full refund for the Recon LT avalanche transceiver. Find out more about the recall here.