These usually do not come with a US manufacturer warranty.
A third-party seller is using Amazon’s warehouse. This is generally safe as Amazon handles the shipping and returns.
You might see a phone listed as an "International Version" at a much lower price. While they often work, there are two big risks:
Sometimes sellers accidentally ship "Carrier-Locked" versions (e.g., locked to Verizon or AT&T) even if the listing says unlocked.
Both sold and shipped by a separate company. Always check their seller rating and recent reviews before buying. 2. Understand "Unlocked" vs. "Carrier-Locked"
Never communicate with a seller or pay outside of the Amazon.com checkout system. Guide to Amazon Refurbished Phones - Phonecheck
Amazon Renewed is a popular way to get high-end tech for less.
The safest bet is to buy phones and "Sold by Amazon" .