Fake iPhone 6 stuck in fast boot mode

[AC Question]

Hi everyone I was wondering if one of you guys could help with a fast boot problem. Iv got a fake iPhone 6s ( don't laugh) I was trying to give it a reboot but it went in to fast boot mode instead. Iv tried the usual like powering off but no joy it just stays on.As it's a fake the battery is soldered to the board so I can't remove it. I know it's fake and I shouldn't really have it but it's a great little phone and does me ok. Any help would be so much appreciated. Thanks again