Christina Warren for Mashable:
The basic problem happens if you get your iPhone’s home button repaired anywhere other than an Apple Store or Apple-authorized repair center. If the home button — which includes the Touch ID sensor — is replaced, you run the risk of getting a dreaded “Error 53” on your phone.
Ever since Apple added the Touch ID sensor, erring on the side of security when damaged, I’ve always encouraged people to get their screens replaced from Apple. The pricing is fair and you get an official part with support. Don’t cut corners on a device you use every day.