-1 Solution

"Unknown error-1 (negative 1)" solution (original) occurs when the firmware is restored and 5.1.1 is restored)

I have used three iphone4 products since March. (Don't be surprised) the specific reason is described in the WF graduation post ~ I have had many experiences in upgrading and restoring the firmware. First, I declare that I am not a huge fan. I want to share my experience with you! There is a risk of Flash brush, please be careful !!!
There are a lot of Flash tutorials on various forums, so I don't have to write them ...... Many people see "Unknown error-1 (negative 1)" during the flash brush process. However, there is almost no tutorial on solving this problem, many people think that hardware needs to be replaced for "Three nos" (I thought it was the same at the beginning), but it is not actually! After an all-night experiment, I finally found a solution to the problem. Okay. You don't need to talk about it!
---------------------------------------------------------------------- This split line is available in general tutorials ------------------------------------------------------
I. Preparations
First, download the required tools.
1. iTunes)
2. Red Snow redsn0w_win_0.9.14b2
3. For firmware files to be updated, find the desired version on the Internet.
4. A computer that can be flushed into a flash drive. Note that the XP system should enable the three services. These flash drive tutorials are all written and will not be repeated here.
It's easy to have the above four options.
Ii. flashing process
Start with red snow

Then select the firmware recovery package you downloaded.

 

Finally

This indicates that the Red Snow software allows you to download the firmware recovery package, and then disable the Red Snow software.
follow the steps of other flash tutorials, briefly speaking
1. Connect your phone to your computer -- open iTunes -- Hold down SHIFT and click Restore
2. Wait -- wait ...... Check whether the mobile phone has changed. If an unknown error 1601 or 1602 occurs before the progress bar appears on the mobile phone, move to another flash tutorial to see how to set the computer, this is not important here.
3. If the progress bar appears like normal recovery and moves slowly, wait until the firmware is restored (almost when the progress bar reaches 2/3! "Unknown error-1 (negative 1)" is the key point. Please do not click OK directly due to panic, in this case, your mobile phone will display "USB + iTunes", indicating that the mobile phone is in recovery mode and will be infinitely restored. (Remember! Do not click "OK" when "Unknown error-1 (negative 1)" appears !!!)
4. If it is incorrect, you don't have to worry about it. In this case, you need to use the downloaded Red Snow redsn0w_win_0.9.14b2 to kick your iPhone out of the recovery mode and enable the red snow again:

the recoveryfix in this figure is gray because it is not connected to the mobile phone. If it is displayed as gray during use, close it and re-open it!
at this time, please follow the prompts to make your mobile phone enter the DFU Mode Step by step, specifically: press and hold the power key for 3 seconds -- then press the Home Key for 10 seconds (do not open the power key when you press the Home Key) -- then open the power separately (press the Home Key) for 15 seconds, at this time, you do not need to move anything. You will see that the Red Snow software will upload data, so that the mobile phone will automatically display command symbols and so on. After the automatic operation on the phone is completed, it will restart. After the restart, you will be able to resume success!
Haha, you're done! Next, activate the mobile phone ~
there may be some problems that cannot be activated by the host machine or that the mobile phone card has no signal. To address these problems, I will write another tutorial, so stay tuned!
All of the above are handmade. It's so tiring ~ If this tutorial solves the problem, click here ttp: // xiaohaozi2522.taobao.com (add h in front, welcome to favorites) for my support, most people can use the content. I just started out, and it's not easy to expect more support from big guys. Thank you first ~
-------------------------------------------------------------------- generally, there will be another ticket.
it has been more than three o'clock in the morning, and I have to go to work today. Write this article today, and write another tutorial tomorrow to solve the problem of inactivable or unserviced services.
in the statement, I am not a great fan. I just want to share some experience with you. Don't like it! There is a risk of Flash brush, please be careful !!!
if you have any questions, please reply to them as soon as possible! Original post by hand. Please indicate the source for reprinting!

I have used three iphone4 products since March. (Don't be surprised) the specific reason is described in the WF graduation post ~ I have had many experiences in upgrading and restoring the firmware. First, I declare that I am not a huge fan. I want to share my experience with you! There is a risk of Flash brush, please be careful !!!
There are a lot of Flash tutorials on various forums, so I don't have to write them ...... Many people see "Unknown error-1 (negative 1)" during the flash brush process. However, there is almost no tutorial on solving this problem, many people think that hardware needs to be replaced for "Three nos" (I thought it was the same at the beginning), but it is not actually! After an all-night experiment, I finally found a solution to the problem. Okay. You don't need to talk about it!
---------------------------------------------------------------------- This split line is available in general tutorials ------------------------------------------------------
I. Preparations
First, download the required tools.
1. iTunes)
2. Red Snow redsn0w_win_0.9.14b2
3. For firmware files to be updated, find the desired version on the Internet.
4. A computer that can be flushed into a flash drive. Note that the XP system should enable the three services. These flash drive tutorials are all written and will not be repeated here.
It's easy to have the above four options.
Ii. flashing process
Start with red snow

Then select the firmware recovery package you downloaded.

 

Finally

This indicates that the Red Snow software allows you to download the firmware recovery package, and then disable the Red Snow software.
follow the steps of other flash tutorials, briefly speaking
1. Connect your phone to your computer -- open iTunes -- Hold down SHIFT and click Restore
2. Wait -- wait ...... Check whether the mobile phone has changed. If an unknown error 1601 or 1602 occurs before the progress bar appears on the mobile phone, move to another flash tutorial to see how to set the computer, this is not important here.
3. If the progress bar appears like normal recovery and moves slowly, wait until the firmware is restored (almost when the progress bar reaches 2/3! "Unknown error-1 (negative 1)" is the key point. Please do not click OK directly due to panic, in this case, your mobile phone will display "USB + iTunes", indicating that the mobile phone is in recovery mode and will be infinitely restored. (Remember! Do not click "OK" when "Unknown error-1 (negative 1)" appears !!!)
4. If it is incorrect, you don't have to worry about it. In this case, you need to use the downloaded Red Snow redsn0w_win_0.9.14b2 to kick your iPhone out of the recovery mode and enable the red snow again:

the recoveryfix in this figure is gray because it is not connected to the mobile phone. If it is displayed as gray during use, close it and re-open it!
at this time, please follow the prompts to make your mobile phone enter the DFU Mode Step by step, specifically: press and hold the power key for 3 seconds -- then press the Home Key for 10 seconds (do not open the power key when you press the Home Key) -- then open the power separately (press the Home Key) for 15 seconds, at this time, you do not need to move anything. You will see that the Red Snow software will upload data, so that the mobile phone will automatically display command symbols and so on. After the automatic operation on the phone is completed, it will restart. After the restart, you will be able to resume success!
Haha, you're done! Next, activate the mobile phone ~
there may be some problems that cannot be activated by the host machine or that the mobile phone card has no signal. To address these problems, I will write another tutorial, so stay tuned!
All of the above are handmade. It's so tiring ~ If this tutorial solves the problem, click here ttp: // xiaohaozi2522.taobao.com (add h in front, welcome to favorites) for my support, most people can use the content. I just started out, and it's not easy to expect more support from big guys. Thank you first ~
-------------------------------------------------------------------- generally, there will be another ticket.
it has been more than three o'clock in the morning, and I have to go to work today. Write this article today, and write another tutorial tomorrow to solve the problem of inactivable or unserviced services.
in the statement, I am not a great fan. I just want to share some experience with you. Don't like it! There is a risk of Flash brush, please be careful !!!
if you have any questions, please reply to them as soon as possible! Original post by hand. Please indicate the source for reprinting!