: If buying used, always check the IMEI number to ensure the phone isn't reported stolen or blacklisted.
: Carries over 1,000 unlocked models and often provides the lowest prices on new devices. You can also get in-person setup help at their physical stores.
: Offers the widest selection of new and refurbished devices from major brands like Apple, Samsung, and Google.
: Specializes in professional refurbishment with a mandatory 30-point inspection and a one-year warranty on all devices.
: Verify the phone supports the frequency bands of your carrier (e.g., AT&T and T-Mobile use GSM; Verizon and Sprint traditionally used CDMA, though most modern 5G phones are cross-compatible).
: Ensure the site offers at least a 14-day return window, as some "factory unlocked" phones may still have minor carrier branding or compatibility issues. Benefits of Unlocked Phones - Best Buy
: Ensure the listing says "Shipped and Sold by Amazon.com" for maximum buyer protection.
