IPSW Downloads

iOS 14.3 - 18C66 for iPhone 6s Plus

This firmware is not signed. This means you cannot restore to it in iTunes.

Release Date14 December 2020
Upload Date09 December 2020
File NameiPhone_5.5_14.3_18C66_Restore.ipsw
File Size4.50 GB
SHA256sum38fcb191f4d5c25ca7be72ccac559ace385ccadba018608bb1c86c1ea4b54e1f
MD5sum927f8f8ecfb6946e6234d69dd667161f
SHA1sum4d3ae504d0b117caf594d10b6fe12766f8179e45
IdentifieriPhone8,2

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPhone 6s Plus to your PC.
  3. Open iTunes and navigate to your iPhone 6s Plus.
  4. Hold the Shift key and click "Restore".
  5. Select the iPhone_5.5_14.3_18C66_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPhone 6s Plus to reboot.

macOS

  1. Connect your iPhone 6s Plus to your Mac.
  2. Navigate to your iPhone 6s Plus in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPhone_5.5_14.3_18C66_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iPhone 6s Plus to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iPhone 6s Plus to your PC.
  3. Open a terminal and navigate to the IPSW file you downloaded, e.g., cd ~/Downloads.
  4. To perform a full erase restore, type idevicerestore -e iPhone_5.5_14.3_18C66_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iPhone 6s Plus to reboot.