Hi guys, Another issue. Trying to restore Using 3utools but won’t it stops on unable to write filesystem. Anyone have any help or advice. Thanks in advance. As we received many users' required, we also made a tutorial about fixing the error -1/1 when you restore or upgrade in iTunes/3uTools for you: Error 1 or -1 This may indicate a hardware issue with your device. Follow Troubleshooting security software issues, and restore your device on a different known-good computer. 3uTools is an all-in-one tool to help iOS users to manage their files and data, it can't fix any hardware problems for you. Thanks for visiting. For more latest updates or supports, follow us on Facebook or Twitter.
- Iphone 6s Plus error unable to restore idevice(-2) Fixed 100% Flash Done Applay All Iphone Models Iphone 4, 4s Iphone 5, 5s Iphone 6, 6s Iphone 7, 7s Iph.
- Hi, in such a situation, you can use iCloud to restore your iPhone. Generally speaking, the problem will be resolved after this action. If not, simply try a repair tool like 3u tool, Joyoshare UltFix, and the like to help you.
3utools Error -2
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Recently, many iOS users complained that there is an annoying unknown error 3503 in iTunes, which stop them from restoring and updating. In fact, Apple isn’t made a full explanation of iTunes error code 3503 yet.
On 3uTools, the error is “Unable to request SHSH”. And on iTunes, it is an unknown error (3503). After we tested and researched, our developer team find out that this issue may be caused by Apple server. As a result, users can not restore their iDevices using iTunes or earlier versions of 3uTools.
3u Team try our best to solve this issue as soon as possible. And finally, we released a new version of 3uTools, V2.16 to fix this.
#Update log of V2.16 3uTools
- Fix the error unable to request SHSH while restoring.
- Support flashing iPhone 8 and iPhone 8 Plus.
- Fix a bug that iPhone 6s and 6s Plus fail to downgrade back to iOS 10.3.3 from iOS 11.
Solutions
1. Please click “Check Update” at the right bottom of 3uTools, and then update to the latest version of 3uTools, V2.16.
2. Then you can restore on 3uTools. Please check the network connection and USB connection before you easy flash on 3uTools.
![3utools 3utools](https://www.3u.com//upload/20181207/1544173386450074447.jpg)
3utools Error -2
The reasons of the error “Unable to request SHSH”
1. It could be the network problem. Please check the network to see if it is available.
2. The iOS version you want to restore may be closed by Apple, please check.
3. If you try the above solutions but still meets the same error, then please update to latest version of 3uTools and try to restore again.
3utools Error Code 9
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3utools Error -1
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