I own a Fenix China. Due to the laziness of Garmin China's developers, I tried to flash it to a US/EU version firmware to enable new functions. Now I flashed it in Quatix. My experience is that the flashing between Quatix<->Fenix is reversible, and there is no way back to China version. But it's for a normal Fenix, I'm not sure for a gone-wrong one.
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