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dmfresco

macrumors regular
Original poster
Sep 8, 2002
222
46
Ann Arbor
I am considering the purchase of an Ultra 2 Watch. The ones on the Apple Store make it clear the sensor is disabled. I am wondering if the Ultra 2 watches from other vendors might not be disabled? Is the disabling happening when the watch is activated? or is it happening based upon the date it was assembled? I really don't want a crippled watch as some of the fitness features that rely on that sensor are important to me. Thanks for any advice?
 

NoBoMac

Moderator
Staff member
Jul 1, 2014
5,817
4,424
Based on part number.

The ability to measure Blood Oxygen is no longer available on Apple Watch units sold by Apple in the United States on or after January 18, 2024. These are indicated with part numbers ending in LW/A.

 

dmfresco

macrumors regular
Original poster
Sep 8, 2002
222
46
Ann Arbor
Thanks super helpful. But I have two questions. What parts numbers still have the sensor active? And do we know if Apple is disabling the sensor via firmware? I am tempted to see if I can find a Series 2 on eBay or Craigslist. I have a Series 9 watch with the sensors still working but want some of the functionality of the Ultra 2 pre-crippling.
 

Jay3197

macrumors member
Sep 16, 2015
73
40
Picked one up from Best Buy today, the sensor is deactivated. However since it’s discounted to $729 vs the full $799 MSRP, I’ll gladly take it.
 

dmfresco

macrumors regular
Original poster
Sep 8, 2002
222
46
Ann Arbor
Picked one up from Best Buy today, the sensor is deactivated. However since it’s discounted to $729 vs the full $799 MSRP, I’ll gladly take it.
I just rolled the dice and bought one on eBay that claims to be the one before the chip disable. I guess we shall see.
 

mtbdudex

macrumors 68030
Aug 28, 2007
2,701
4,294
SE Michigan
ca99baee88faebd784b4db66e89bb54a.jpg

Saw the news, jumped on this 12/23/2023 .. O2 sensor works fine “still”

The O2 data seems more buried in the health app than prior , but it’s there.
My Apple Watch 7 old data and newer awu2 data.
bfd35b8963d63fac3ff07d542005b5e4.jpg

934d61a8840c089ea26e0fee82e88e5a.jpg
 

wgaller

macrumors 6502
Oct 21, 2012
424
476
Bought two Series 9's from ATT - two weeks ago, both have O2 sensor app.
 

lanceuppercut47

macrumors regular
Feb 16, 2013
227
67
ca99baee88faebd784b4db66e89bb54a.jpg

Saw the news, jumped on this 12/23/2023 .. O2 sensor works fine “still”

The O2 data seems more buried in the health app than prior , but it’s there.
My Apple Watch 7 old data and newer awu2 data.
Of course your sensor still works fine, because it only affects models sold after 18th Jan 2024..
 

Jay3197

macrumors member
Sep 16, 2015
73
40
Weird, brought mine on 2/13 from Bestbuy and while it has the app, if you tap on it a message pops up stating it is no longer available. Got the watch at $70 off so I don’t mind, probably wouldn’t have used it anyways.
 

M33-1

macrumors 6502
Jun 15, 2010
393
288
Such a small percentage of the population would use the oxygen readings for athletic reasons. In the real world, folks might need it for respiratory illness tracking like flu, covid, or copd. I wouldn’t worry about NOT having the feature. The watch does so much more.
 

dmfresco

macrumors regular
Original poster
Sep 8, 2002
222
46
Ann Arbor
Such a small percentage of the population would use the oxygen readings for athletic reasons. In the real world, folks might need it for respiratory illness tracking like flu, covid, or copd. I wouldn’t worry about NOT having the feature. The watch does so much more.
I guess, I am in the minority then. I am happy to have gotten a refurbished Ultra 2 with the sensor active. In my own life, it contributes to sleep and exercise metrics. In my work life, I am a researcher and we are interested in what is becoming known is digital phenotyping and just-in-time adaptive interventions. Passive and wearable sensors are important tools. We don't rely just on Apple, but as someone who uses Apple devices, I hope they remain current and relevant and solve their squabble with Massimo or find a work around.
 
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