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Welcome to iMore! Error 47 usually points to a hardware issue with iPhone's logic board. In other words, there isn't a software resolution that I'm aware of. Your best bet is to contact Apple Support or take your phone into an Apple Store.
You could always try running a restore in recovery mode. I'm not sure it will help but it's at least worth a try. https://support.apple.com/en-us/HT201263