Always look for the word in the title or description if you want to use the phone with any carrier.
They may lack certain 4G or 5G bands used by US carriers (like T-Mobile or Verizon), leading to poor signal in some areas. 5. Spotting Scams buying phones off amazon
If a brand-new iPhone 15 is $300, it’s likely a scam or a "dumb phone" clone. Always look for the word in the title
The safest bet is to buy phones and "Sold by Amazon" . buying phones off amazon