If your product was purchased from an OtterBox authorized retailer, and that product is still within the applicable warranty, then your damaged product is eligible for a warranty replacement.

OtterBox products are always complete with packaging outside and written materials inside. If the packaging is damaged, faded, sloppy, incomplete, or contains misspellings, the product it contains is likely a fake.

There is no requirement to register your OtterBox case for warranty. However, you may need to provide proof of purchase from an authorized dealer when submitting a warranty claim. Keeping your purchase receipt or invoice for warranty is always a good idea.

Only if you paid for an "Accidental Damage" Geek Squad plan for your phone. Otherwise Best Buy, nor Otter Box will cover a damaged phone, even if it broke inside the case. It's a preventative measure, but it's not 100% guaranteed to protect your phone from everything.