Downgrade Original iPhone to iOS 1.0

AmazingHenry

macrumors 65816
Original poster
Jul 6, 2015
1,286
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Central Michigan
I've got an original iPhone/iPhone 2G, and I'd really like to downgrade it to iOS 1.0. I tried Google, and I found many guides on how to do this. Some are really easy, but some are long and complicated. What is the easiest way that actually works? I'd appreciate someone who has done the process to link me to some working instructions. Thanks so much!

P.S. I know that it's actually called "iPhone OS" or "OS X".
 

eyoungren

macrumors Core
Aug 31, 2011
21,181
13,025
ten-zero-eleven-zero-zero by zero-two
I've got an original iPhone/iPhone 2G, and I'd really like to downgrade it to iOS 1.0. I tried Google, and I found many guides on how to do this. Some are really easy, but some are long and complicated. What is the easiest way that actually works? I'd appreciate someone who has done the process to link me to some working instructions. Thanks so much!

P.S. I know that it's actually called "iPhone OS" or "OS X".
Might want to try over here… http://forums.macrumors.com/forums/jailbreaks-and-ios-hacks.105/

You're probably going to need to be jailbroken.
 

AmazingHenry

macrumors 65816
Original poster
Jul 6, 2015
1,286
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Central Michigan
It's a very long and complicated process. The lowest most were able to go is 1.1.4 and not 1.0
I guess I was pretty lucky to get to 1.1.1, then. I've gotten it downgraded to 1.1.1 but I couldn't jailbreak it.
You should post some pics of the device and screens. For nostalgic reasons of course!
Once I get it downgraded, I sure will!
Might want to try over here… http://forums.macrumors.com/forums/jailbreaks-and-ios-hacks.105/

You're probably going to need to be jailbroken.
I have a valid AT&T SIM card to activate it with.
 
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eyoungren

macrumors Core
Aug 31, 2011
21,181
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ten-zero-eleven-zero-zero by zero-two
I have a valid AT&T SIM card to activate it with.
What I mean is that in order to do any downgrading you will probably have to jailbreak the phone first.

I don't think the SIM card of activation has anything to do with what you are trying to accomplish.

Jailbreaking is that act of using exploits to escalate priviledges. That allows you to do things you ordinarily would not be able to do.

However, I only came in to Apple and iOS with iOS 5 so I have no idea exactly what you need to do.

It seems however @Applejuiced does.
 
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Applejuiced

macrumors Westmere
Apr 16, 2008
40,650
6,404
At the iPhone hacks section.
I guess I was pretty lucky to get to 1.1.1, then. I've gotten it downgraded to 1.1.1 but I couldn't jailbreak it.

Once I get it downgraded, I sure will!

I have a valid AT&T SIM card to activate it with.
Wow, you got it that low.
That's pretty good.
Way too many hoops to jump to get it that low.
I would have went for 3.1.3
 

Gathomblipoob

macrumors 601
Mar 18, 2009
4,709
3,526
What I mean is that in order to do any downgrading you will probably have to jailbreak the phone first.

I don't think the SIM card of activation has anything to do with what you are trying to accomplish.

Jailbreaking is that act of using exploits to escalate priviledges. That allows you to do things you ordinarily would not be able to do.

However, I only came in to Apple and iOS with iOS 5 so I have no idea exactly what you need to do.

It seems however @Applejuiced does.
I remember that first 74-step jailbreak. One misstep and it was back to square one. Jeesh.
 

eyoungren

macrumors Core
Aug 31, 2011
21,181
13,025
ten-zero-eleven-zero-zero by zero-two
I remember that first 74-step jailbreak. One misstep and it was back to square one. Jeesh.
I read about it a couple years ago. Lots of software/hardware stuff going on. Back when bricking the phone was a real possibility - not this bootloop stuff people freak out over now.

Comparatively, I jailbroke iOS 5 on my 3GS three times before I spotted Cydia on my springboard. It jailbroke the first time but it was so quick and easy I didn't realize it WAS jailbroken until the third time around!
 

Ternary

macrumors regular
Jul 4, 2015
143
103
I've managed to downgrade an original iPhone to 1.0.2. 1.0 didn't work for some reason, and 1.0.2 was similar, but with bug fixes.

To be honest, the roadblocks and frustrations it takes to complete the downgrade aren't worth the results. For one, you'll need a spare Windows XP computer to do it (not a VM if I can recall). In my case, the only XP computer I had was from 2001, so that was quite an adventure. Also, you'll need to be prepared to endure through intensive hours of troubleshooting and pulling your hair out. It's a really difficult process, and even if you follow all the instructions, there's still a good chance you'll fall into an error at some point.

And if you can make it through all those barriers and successfully downgrade, you'll quickly realize how limited iPhone OS 1.0 really is. You can't install any additional apps, and after playing around with the included apps (which are quite watered down compared to newer versions), there's a good chance you'll get bored due to what little you can really do. In essence, you're putting yourself through a lot of grief in order to cripple the functionality of your phone.

So unless you like the challenge, cannot live without that dose of nostalgia, or desire to showcase the iPhone like a museum artifact, I wouldn't recommend trying the downgrade. If you do fit one of those three reasons however, I used this YouTube guide to work through the process.
 

Zimmy68

macrumors 68000
Jul 23, 2008
1,776
1,078
I think I have the first iPod touch in a drawer somewhere which was basically the first phone.
That was back when they wanted to charge money for os updates.
Much better times now.
 
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G.McGilli

macrumors regular
Oct 19, 2015
230
123
I have original iPhone jailbroken - would be fun to downgrade it. I forget what the jailbreak is - but it has the Pineapple logo when the phone boots. Good times....
 

AmazingHenry

macrumors 65816
Original poster
Jul 6, 2015
1,286
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Central Michigan
I've managed to downgrade an original iPhone to 1.0.2. 1.0 didn't work for some reason, and 1.0.2 was similar, but with bug fixes.

To be honest, the roadblocks and frustrations it takes to complete the downgrade aren't worth the results. For one, you'll need a spare Windows XP computer to do it (not a VM if I can recall). In my case, the only XP computer I had was from 2001, so that was quite an adventure. Also, you'll need to be prepared to endure through intensive hours of troubleshooting and pulling your hair out. It's a really difficult process, and even if you follow all the instructions, there's still a good chance you'll fall into an error at some point.

And if you can make it through all those barriers and successfully downgrade, you'll quickly realize how limited iPhone OS 1.0 really is. You can't install any additional apps, and after playing around with the included apps (which are quite watered down compared to newer versions), there's a good chance you'll get bored due to what little you can really do. In essence, you're putting yourself through a lot of grief in order to cripple the functionality of your phone.

So unless you like the challenge, cannot live without that dose of nostalgia, or desire to showcase the iPhone like a museum artifact, I wouldn't recommend trying the downgrade. If you do fit one of those three reasons however, I used this YouTube guide to work through the process.
Wow, you got lots of time and patience:D
But pretty much what you said it's spot on.
It's not worth the aggravation.
I do like a challenge, and I do still want to do the process on Monday. One question: The only computer I have that can natively boot Windows XP is an old Intel iMac. Would that work?
 
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jav6454

macrumors P6
Nov 14, 2007
16,864
1,480
1 Geostationary Tower Plaza
I've got an original iPhone/iPhone 2G, and I'd really like to downgrade it to iOS 1.0. I tried Google, and I found many guides on how to do this. Some are really easy, but some are long and complicated. What is the easiest way that actually works? I'd appreciate someone who has done the process to link me to some working instructions. Thanks so much!

P.S. I know that it's actually called "iPhone OS" or "OS X".
You can't. The only tools available to achieve this task is called Pwnage Tool which only goes as far back as iPhone OS 1.1.3

Anything behind that is a no go.
 
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AmazingHenry

macrumors 65816
Original poster
Jul 6, 2015
1,286
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Central Michigan
You can't. The only tools available to achieve this task is called Pwnage Tool which only goes as far back as iPhone OS 1.1.3

Anything behind that is a no go.
There has been success with downgrading to 1.0 before. As said earlier, I managed to get to 1.1.1 using iTunes 7 on Windows XP.
 

AmazingHenry

macrumors 65816
Original poster
Jul 6, 2015
1,286
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Central Michigan
No one has done it. Once you hit 1.1.1, there is no way down. The only way possible is if the software was already at 1.0.1 or 1.0.2

Not even through BootNeuter can you achieve this, and that's already pretty complex stuff on its own.
It has been done. Try
. There are other videos as well. People have successfully downgraded. :D
 

jav6454

macrumors P6
Nov 14, 2007
16,864
1,480
1 Geostationary Tower Plaza
It has been done. [...] People have successfully downgraded. :D
You need Zibri's ZiPhone, you need Dev Team's early BootNeuter and Pwnage versions, you need the iPhone OS bundles and even SSH know how. You even need the first unlocking software patch anySIM which is no longer even there in Cydia.

Many things that are no longer available. Specially given how old every thing is.