I have a problem with my iPhone 6. My iPhone 6 bootloops similar to this question: Why would my iPhone 6 be stuck in a dead battery loop?
However, the answers there do not help. In addition, when I try to restore my iPhone, I get an Error 9. I have not tried a new USB cable, but I want to check if that is it before I buy a new one.
I have tightened the battery and Lightning port connections, and this phone was never dropped in water.