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My info. Ordered it for in-store pickup last Wed.

Nice Name: iPhone 5s
Family name:
Group1: iPhone
Group2:
Generation:
CPU speed: 1.3GHz
Screen size: 4 inch
Screen resolution: 1136x640 pixels
Colour: Gold
Production year: 2013
Production week: 38 (September)
Model introduced: 2013
Capacity: 64GB
Memory - flavour: xx
Factory: F2 (China, Zhengzhou - Foxconn)
 
Nice Name: iPhone 5s
Family name:
Model Number: ME296
Group1: iPhone
Group2:
Generation:
CPU speed: 1.3GHz
Screen size: 4 inch
Screen resolution: 1136x640 pixels
Colour: Space Gray
Production year: 2013
Production week: 35 (September)
Model introduced: 2013
Capacity: 16GB
Memory - flavour: xx
Factory: C3 (China)

Got mine from Walmart on launch day
 
I got mine on launch day at a AT&T store in Kansas.

Nice Name: iPhone 5s
Machine Model: iPhone6,1
Family name: A1533
Model Number: ME311
Group1: iPhone
Group2:
Generation:
CPU speed: 1.3GHz
Screen size: 4 inch
Screen resolution: 1136x640 pixels
Colour: Space Gray
Production year: 2013
Production week: 37 (September)
Model introduced: 2013
Capacity: 64GB
Memory - flavour: xx
Factory: C3 (China)

Hmmm week 37, so made between SEP 8-14.
 
not accurate

The minute you update to iOS 7.0.2, that date gets reset.

This will yield production week:

http://www.chipmunk.nl/cgi-fast/applemodel.cgi

38 is the last week of September. My phone was manufactured then.
that is not accurate, since I updated to 7.0.2 on friday last week, 10/4/13, and it still say September 28, 2013 on the date at the bottom of the main screen.

mine is week 38, F1 (china) just got it last friday (10/4/13), it arrived in the store that morning.
 
Nice Name: iPhone 5s
Family name: A1453
Group1: iPhone
Group2:
Generation:
CPU speed: 1.3GHz
Screen size: 4 inch
Screen resolution: 1136x640 pixels
Colour: Silver
Production year: 2013
Production week: 35 (September)
Model introduced: 2013
Capacity: 64GB
Memory - flavour: xx
Factory: DN (China, Chengdu - Foxconn)


64 gb silver. looks like I have the oldest one yet!
 
Purchased on release day at AT&T store

Production week: 36 (September)
Factory: F2 (China, Zhengzhou - Foxconn)
 
Nice Name: iPhone 5s
Family name: A1453
Group1: iPhone
Group2:
Generation:
CPU speed: 1.3GHz
Screen size: 4 inch
Screen resolution: 1136x640 pixels
Colour: Silver
Production year: 2013
Production week: 35 (September)
Model introduced: 2013
Capacity: 64GB
Memory - flavour: xx
Factory: DN (China, Chengdu - Foxconn)


64 gb silver. looks like I have the oldest one yet!

Mine is space gray 64gb from the same factory but week 36 picked up on launch day.
 
iPhone 5s 16GB Silver | ME342LL/A | Week 39, (October) F1

iPhone 5s 16GB Gold | ME343LL/A | Week 43, (October) DN
 
iPhone 5S 32GB Space Gray - week 42 - F2 factory (China, Zhengzhou - Foxconn)

Bought in Denmark at launch (last friday (October 25th).
 
So confusing....
When I enter my serial no. Chipmunk web site shows "production week" for my 5s to be: "42 (October)".

Week 42 ended on the 18th (I think?)
Phone was sent from China on 19th Oct. and delivered on 23rd

However, after I set up the phone, Settings/Cellular/"Reset Statistics" (at bottom of page) said: 30 Aug. 2013 .
That is equivalent to week 35 (6 weeks prior to week of manufacture)

Since this phone is a replacement for another 5S - I wish to confirm it's not a re-furb. It arrived with precisely the same packaging as prior device - but I'm puzzled by the "reset statistics" date which precedes that of the supposed date of manufacture.

Any thoughts?
 
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