A:AnswerBest Buy can’t actually replace batteries themselves, they just tell you that to get you in the store. They have to send it off to Apple and leave you without a phone for several days.
A:AnswerHi there. Thank you for your question! We do need your PIN while we work on your phone at our Geek Squad. If you have any further questions on this, I'd recommend speaking to your local Best Buy's Geek Squad. I hope this helps! You can find information about your local store at www.bestbuy.com/storelocator.
A:AnswerApple has determined that a very small percentage of iPhone 12 and iPhone 12 Pro devices may experience sound issues due to a component that might fail on the receiver module. Affected devices were manufactured between October 2020 and April 2021.
If your iPhone 12 or iPhone 12 Pro does not emit sound from the receiver when you make or receive calls, it may be eligible for service.
Apple or an Apple Authorized Service Provider will service eligible devices, free of charge.
iPhone 12 mini and iPhone 12 Pro Max models are not part of this program.
https://support.apple.com/iphone-12-and-iphone-12-pro-service-program-for-no-sound-issues