Procedure when replacing an iPhone with manufacturing defect
Hi,
Recently I had an appointment at an Apple Store in Brazil to replace the battery on my iPhone 7. I left the phone at the store after signing the terms (the one that states that should the phone have any water related damage I would be able to purchase a new one at a discounted price and etc). When I came back, they informed me that due to a manufacturing defect that made them unable to remove the battery from my phone, they would give me a new, same model, iPhone and charge me the price of changing the battery (which is considerably cheaper). I agreed, and the new phone they brought me came in a different box (not the one you get when buying a brand new one), that had no accessories. The new phone is GSM, while the old one wasn't. Also, I was informed that the warranty on the new phone has the same length of a replacement battery, as opposed to the length of the warranty on a new iPhone. I noticed the Model value starts with an "N", which I read to mean that this is a phone made for replacements, but I couldn't verify this information on the official Apple website.
My question is: Is this the standard Apple procedure? I have the impression the battery is not lasting as long as it should, specially for a new phone.
Thanks in advance.
iPhone 7, iOS 12