Description of iTunes error and some solutions for Solved

 

- Error 1 firmware bug does not fit the device or version of iTunes is too old to work with this version of Update iTunes to the latest version, if the error persists, siphon firmware again

- Error 2 Firmware error is detected, but can not be used due to the fact that the assembled and packaged properly (usually an error occurs when using custom firmware) Siphon firmware or try another

- Error 4 (or 4), this error can occur under the following conditions: Access to ports 80 or 443 is blocked; Firewall, security software, or other third-party Internet access setup to block access to servers or albert.apple.com phobos.apple.com; ITunes Store server is overloaded.

- Error 5, 6 firmware can not be installed due to damage or download logos, or due to the fact that the device is not entered in the service mode (for example, the firmware is designed to DFU Mode, and you are trying to recover through the Recovery Mode) Input device in DFU Mode, if you do not help - download other firmware

- Error 8 Firmware version is coming to iTunes, but not suitable for the device (for example, it is not for the generation devices) Download the firmware version that corresponds to the model of your device

- Error 9 kernel panic in the device when working with the firmware. There is a cliff or data cable, or incompatibility with the firmware recovery mode selected Try to restore the firmware through mode DFU Mode. Check whether securely attached cable into USB-port and 30-pin connector of the device. Change the cable or port.

- Error 10 is missing or damaged boot LLB low level due to crooked collected custom firmware download other custom firmware or rebuild it yourself

- Error 11 The firmware is not enough number of required files (BBFW). Download other custom firmware or rebuild it yourself

- Error 13 problem USB-cable or 30-pin connector or an attempt to install the beta version of iOS for Windows Change the cable or the USB-port. Disable the BIOS USB 2.0

- Error 14 during the needling was found violating the integrity of the firmware file Disable the firewall and antivirus software, try changing your cable or USB-port, try another firmware

- Error 17 Attempting to upgrade from one to another custom firmware custom firmware Before flashing, enter the device into Recovery Mode mode or DFU Mode

- Error 18 (or -18), this error occurs when the media library on the device is damaged and can not be changed or updated. To resolve this issue, try to update iTunes to the latest version and run the recovery again.
 - Error 19 (or -19), this error occurs when you upgrade iPhone 3G to a later version of the software when iTunes tries to back up the iPhone during synchronization. To resolve this problem, follow these steps:
- Uncheck "Automatically sync when this iPhone is connected" in the tab "Overview" in iTunes.
- Remove the iPhone.
- Reconnect the iPhone.
- Select "Update". 

- Error 20 instead of DFU Mode mode the device is in Recovery Mode Enter the device in DFU Mode

- Error 21 Error in DFU-mode when the device jailbreak Enter DFU Mode via Pwnage Tool, sn0wbreeze or redsn0w

Impressions and the performance of iOS 8.1.1 for iDevice

The update iOS 8.1.1 for iPhone and iPad is available and is intended primarily to improve performance on iOS 8.

iOS 8.1.1 Upgrade

No particular problem during the installation process for iOS 8.1.1 for iPhone. The problems are more common at major update as iOS 8.0 because millions of people are trying to install the same time the new operating system ... especially since users expect more feedback and want to do not all lose the ability to jailbreak their iPhone.

 IOS 8.1.1 installation process took about 15 minutes via OTA, it must be said that the update for the iPhone 6 will only download 50MB The installation process itself only takes a few minutes and it also depends on the quality of your wireless connection.
Before you jump in the installation of iOS 8.1.1, it may be important to follow these tips to help you avoid some "bad" surprises.

 IOS 8.1.1 performance on iPhone 6
The developers have made many updates and fixes for application compatibility with iOS 8. The result of this work bears because I have not encountered any problems among the many applications installed, which was not the case with the passage on iOS 7.
Now keep in mind that the slight reduction in performance over time if you install many applications or if you let them all run in the background in the multi-task.
  
Wi-Fi, Bluetooth and cellular data
Wi-Fi, cellular data and Bluetooth were originally bug for some users running iOS 8.1 iOS 8.1.1 but, all connections appear to function smoothly. WiFi connectivity is still very reliable and I was able to connect my iPhone to different Bluetooth accessories.