How to know if an iPhone is new, refurbished, or a replacement

Ever wondered what M, F, N, or 3A means on your iPhone and how it helps to find out if it’s new, refurbished, or replaced?

M, F, N, or 3A? What the first letter of your iPhone’s model number actually means

An iPhone may look perfect on the outside, but how do you know if it is new, refurbished, or a replacement unit?
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iPhone: Did you buy an old iPhone on sale? The model number holds important secrets, so understand the details..

Did you buy a new iPhone during this sale? Is the iPhone you thought was new, really, or was it a used or replacement phone sold at a cheaper price? It's worth noting that during festive sales, the ...