how to check if my iphone x is refurbished?

How to Determine if iPhone is New, Refurbished, Replacement, or Personalized

You can decipher the device model prefix to determine the original status of an iPhone (and probably an iPad too) device, here’s how:

1. Open the “Settings” app on the iPhone
2. Go to “General” and then go to “About”
3. Look for “Model” and then read the model identifier next to that text, it will look something like “MN572LL/A”, the first character will let you know if the device is new, refurbished, replacement, or personalized:
   • M – Brand new device, meaning the device was purchased new
   • F – Refurbished device, meaning the device has been through refurbishing process
   • N – Replacement device, meaning the originally bought device was replaced by this model likely due to a service request
   • P – Personalized device with engraving, meaning the device was customized with an engraving on purchase

What makes you suspect it is refurbished? What is the model number? Did you purchase it from an authorized Apple reseller?

I suggest you go back to the store you bought it and clarify. Hope you purchased it from an authorised reseller. 🙂