A:AnswerIt honestly depends on your bestbuy staff. Some may take it back and charge a restocking fee to return the item, and refund you. Others will only offer to give you the same ring at no cost since you are on a 2 year warranty. Technically it only covers the replacement of your Ring 4 with an identical ring 4 but it doesn’t hurt to try! Worst they can say is no.
A:AnswerUnsure. Best to check with your HSA provider to see if it's eligible. Since it's health-related, it might be but Your Mileage My Vary depending on your provider.
A:AnswerMy wife wears it on her left index finger (same side as her wedding band, so her ring finger is already occupied. I believe the index finger is the finger the company most recommends for most accurate metrics.