[Help] How do I boot my Honor 6 in FastBoot?

Hi there,
I have a Honor 6 H60-L04 B371 and I can't boot the phone in FastBoot.
I read online that I have to press Power + Volume Down, but nothing happens and the phone reboots normally.
I also tried to press Power + Volupe Up, but it goes into the recovery.
Can somebody help me please?

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