There is a revised model of the GSM iPhone 4?

chrismarle · Feb 11, 2013, 11:26 PM

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.

ConCat · Feb 11, 2013, 11:28 PM

It's the 8GB model.

Applejuiced · Feb 11, 2013, 11:51 PM

Quote:

Originally Posted by ConCat

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?

Beeplance · Feb 12, 2013, 12:01 AM

There's also an iPad 2 Wifi (Rev A). How do you explain that?

chrismarle · Feb 12, 2013, 01:34 AM

Quote:

Originally Posted by ConCat

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

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

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.

TwistedPain · Feb 12, 2013, 03:52 AM

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).

bohbot16 · Feb 12, 2013, 07:21 AM

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!

Applejuiced · Feb 12, 2013, 02:08 PM

Quote:

Originally Posted by TwistedPain

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.

bohbot16 · Feb 12, 2013, 02:14 PM

Quote:

Originally Posted by Applejuiced

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.

Applejuiced · Feb 12, 2013, 02:15 PM

Quote:

Originally Posted by bohbot16

Yeah, I suspect it's a 45nm->32nm die shrink of the A4.

True, that would explain the new firmware built.

Feb 11, 2013, 11:26 PM	#1
chrismarle macrumors Demi-God Join Date: Jun 2011 Location: Canada	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. Attached Thumbnails
	1

Feb 11, 2013, 11:28 PM	#2
ConCat macrumors 6502a Join Date: Jul 2012 Location: behind you. No, seriously.	It's the 8GB model. __________________ Con + Cat
	1

Feb 12, 2013, 12:01 AM	#4
Beeplance macrumors 65816 Join Date: Jul 2012 Location: Singapore	There's also an iPad 2 Wifi (Rev A). How do you explain that? __________________ -iPhone 3GS white 16GB iOS 6.1.3 -iPhone 3GS black 16GB iOS 6.1.3 -iPod Touch 4G white 32GB iOS 6.1
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Feb 12, 2013, 03:52 AM	#6
TwistedPain macrumors member Join Date: Apr 2011	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).
	1

Feb 12, 2013, 07:21 AM	#7
bohbot16 macrumors 6502a Join Date: Mar 2009	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!
	0