XPost: misc.phone.mobile.iphone

On 2023-10-01 09:16, Alan Browne wrote:

On 2023-10-01 01:32, sms wrote:

On 9/30/2023 4:33 PM, badgolferman wrote:

<snip>

Do they test them against the most popular apps as rated on their own
App
Store?

What is odd about the "fix" to iOS 17 to address the overheating issue
in the iPhone 15 Pro/Pro Max is that if there really is some kind of a
problem with some of the apps that causes overheating by "overloading
the iPhone CPU" then why isn't the same issue occurring with the
iPhone 14 Pro/Pro Max with the A16 Bionic?

You expect the software package to be identical across different devices?

It's likely that these apps, whatever they are, are causing the A17
Bionic to run at maximum power which is too much for the thermal
solution in the iPhone 15 Pro/Pro Max to deal with.

Apparently no issue that can't be fixed in both iOS and some 3rd party
apps.

It was also odd to see that claim that the titanium frame will conduct
heat out the phone better than the stainless steel frame in the iPhone
14 Pro/Pro Max since titanium is a poorer thermal conductor. And if it
did conduct heat better then the outside of the phone would get even
hotter but the inside would be cooler.

Let's see. There are a range of stainless steel alloys with varying
degrees of thermal conductivity.  Per Apple they use "Surgical grade" stainless in the iPhone 14. ( * ) below.

SS - 304 : 14.4 W/(mK)
SS - 347 : 14.3 W/(mK)
SS - 316 : 16.3 W/(mK) *
SS - 440 : 24.2 W/(mK) *
SS - 420 : 24.9 W/(mK) *

SS - 630 : 18.4 W/(mK) * // also referred to as "17-4".

Titanium:  24.5 W/(mK) - better than SS 304,347,316 630.  Same as 440
and 420.

This is in Watts per metre-Kelvin. Thus the thicker the material, less
the conductivity (obviously).  For you non-metric folks, a Kelvin is a difference of 1°C with 0K at absolute 0.

Finding 1)
So, Titanium is a better heat conductor in the kinds of SS that Apple
likly used (the 440/420 are very hard SS so not ones you'd want to manufacture at large volume).  And even if you used 440 or 420 it would
be the same thermal conductivity as Titanium.

*Denotes so-called "Surgical steel" - although there is no formal
definition of such.

Issue 2)
Further, It's not so much the thermal conductivity that matters as the
way the thermal management is designed: placing the hot components where their heat has a pathway to the outside via conducting material or other means.

Issue 3)
Further, since Titanium is stronger, you may need less thickness, thus
the heat transits across less of it - so more conductivity.  This is speculation on my part..

--
“Markets can remain irrational longer than your can remain solvent.”
- John Maynard Keynes.

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XPost: misc.phone.mobile.iphone, comp.sys.mac.advocacy

Alan Browne <[email protected]> wrote

It's likely that these apps, whatever they are, are causing the A17
Bionic to run at maximum power which is too much for the thermal
solution in the iPhone 15 Pro/Pro Max to deal with.

Apparently no issue that can't be fixed in both iOS and some 3rd party
apps.

We can't count the number of times Apple has released a defective product
which Apple only looked at well _after the shit hit the fan_ in news.

Take the Facetime bugs that a mere kid found. Remember that? When Apple
finally looked at Facetime for the first time - they found scores of holes.

Same thing when Apple finally looked at their defective power-delivery
(where they tried to hide their design incompetence & got caught doing it).

It's no different here in that it's the _same pattern_ Apple always uses.

1. First Apple releases an untested (defective in this case) product.
2. Then, _after_ people pay for it, the shit hits the fan (in the news).
3. Only then does Apple even _bother_ to think about testing the product.

Once Apple takes a quick look at the product, Apple finds issues
_everywhere_ (from Instagram to indexing to iOS 17 to charging, etc.).

Can you believe that?

Everything causes this defective iPhone to overheat according to Apple.
a. Instagram
b. Indexing
c. Charging
d. Gaming
e. Updating
etc.

If _that_ many diverse things cause these defective iPhones to overheat,
then it's pretty darn clear Apple did not sufficiently test the device.

A. Apple belatedly only tested it _after_ the shit hit the fan, and,
B. even then, Apple *blamed everyone but themselves* for the defects.

To an intelligent adult, the source of the defect is patently obvious.
*Apple forgot to test the defective iPhone 15 before selling it*

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