When did I purchase this phone?
Date of purchase of this iPhone
Question marked as
User to user only forum. We don't know you. We don't what phone you own or have any clue when you bought it.
If you didn't keep a copy of the receipt, either printed or email, contact the store you purchased the phone from.
If you are trying to check your warranty coverage, you can check that via this link --> Check Your Service and Support Coverage - Apple Support