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LBT EU version firmware has official released, all FrSky XJT, X-series receivers, transmitters shipped to European countries are installed LBT firmware from now on, which improves the RF performance a lot, including operation range and stability.
FrSky are highly suggesting you to upgrade your radios, X-series modules and receivers from old EU firmware to their corresponding LBT firmware, use FrSky Radios or PC for upgrade.
Firmware download & How-to Upgrade: http://www.frsky-rc.com/download/view.php?sort=&down=217&file=EU%20LBT%20Firmware
Notice: Please note that this LBT firmware is not compatible with previous EU version firmware, so please flash both the TX/TX module and receiver to make sure they work with each other. Non-EU users do not need to flash.