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Old Feb 11, 2013, 11:26 PM   #1
chrismarle
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There is a revised model of the GSM iPhone 4?

Hi guys,

I was browsing through the iOS Dev Center and I noticed that there is a firmware for a revised model of the GSM iPhone 4. Anyone has a clue of what it is or where it came from? I actually never heard of it before I looked in the Dev Center.
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Old Feb 11, 2013, 11:28 PM   #2
ConCat
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It's the 8GB model.
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Old Feb 11, 2013, 11:51 PM   #3
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Quote:
Originally Posted by ConCat View Post
It's the 8GB model.
Good catch.
But would they make a special firmware version just for the same version iphone 4 with less storage?
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Old Feb 12, 2013, 12:01 AM   #4
Beeplance
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There's also an iPad 2 Wifi (Rev A). How do you explain that?
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Old Feb 12, 2013, 01:34 AM   #5
chrismarle
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Quote:
Originally Posted by ConCat View Post
It's the 8GB model.
But we never saw an iPhone 3GS revision model when they launched the 8Gb one at the iPhone 4 announcement.

Quote:
Originally Posted by Applejuiced View Post
Good catch.
But would they make a special firmware version just for the same version iphone 4 with less storage?
I find that weird too for the reason I just said.

Quote:
Originally Posted by Beeplance View Post
There's also an iPad 2 Wifi (Rev A). How do you explain that?
The revision model of the iPad 2 had a new 32nm A5 chip instead of the 40nm chip found in the "first" iPad 2.
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Old Feb 12, 2013, 03:52 AM   #6
TwistedPain
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Upon searching the Internet for an answer everyone seems to suggest the 8GB 4 gets this firmware. However like you've suggested that typically does not require different firmware alone. There might be a slight hardware difference too (besides memory).
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Old Feb 12, 2013, 07:21 AM   #7
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Apple may have done a die shrink on the iPhone 4's A4 processor to lower cost. This would follow the same method used for the iPad 2 WiFi Rev A, when the A5 went from a 45nm process to a 32nm process. These shrinks make it so you can manufacture more chips at a time (more per wafer). Apple was able to lower the price of the iPad 2 by $100 as a result.

I'm wondering if this is related to the recent rumors of a cheaper iPhone. Good find!
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Old Feb 12, 2013, 02:08 PM   #8
Applejuiced
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Originally Posted by TwistedPain View Post
Upon searching the Internet for an answer everyone seems to suggest the 8GB 4 gets this firmware. However like you've suggested that typically does not require different firmware alone. There might be a slight hardware difference too (besides memory).
Yep, that would make sense.
Maybe they changed something on the hardware besides just half the amount of storage.
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Old Feb 12, 2013, 02:14 PM   #9
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Quote:
Originally Posted by Applejuiced View Post
Yep, that would make sense.
Maybe they changed something on the hardware besides just half the amount of storage.
Yeah, I suspect it's a 45nm->32nm die shrink of the A4.
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Old Feb 12, 2013, 02:15 PM   #10
Applejuiced
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Originally Posted by bohbot16 View Post
Yeah, I suspect it's a 45nm->32nm die shrink of the A4.
True, that would explain the new firmware built.
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