Replaced iphone 4 Serial

[navigates]

Hi All,

I have got a replaced iphone 4 with serial J910312xxxx.
Is this a refurbished product? .When is it manufactured?

 

[dhlizard]

Hi All,

I have got a replaced iphone 4 with serial J910312xxxx.
Is this a refurbished product? .When is it manufactured?

Perhaps...

Apple used to use a "K" in the second digit as an indicator of a refurb (xK930)
Perhaps they are using a 1st character indicator now. In my experience, the first 2 digits which indicate which factory made the phone have always been two numbers except for refurbs (97xxx)