iOS 11.2.1 (15C153)

IPSW Firmware Unsigned
Product
Device
Version
4
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Official IPSW Download

Download iOS 11.2.1

Download OTA Update

This firmware is provided as a direct link to Apple's official servers. No mirroring or modification is performed.

Firmware Information

Version

iOS 11.2.1

Build ID

15C153

Release Date

December 13, 2017

File Size

2.47 GB

File Name

MD5 Sum

d2ad5a1613a62b5170615d97d3de29b2

SHA1 Sum

202b14e1e0f2cdbffc9a08c3aff9a75a4d9c1eee

About this Device

Identifier

iPhone8,1

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Need help?

Our community guide has everything you need to know about restoring firmwares.

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How to Install?

Follow these critical steps to ensure a successful firmware installation.

1

Secure Your Data

Always start by creating a full backup of your device via iCloud or a computer to ensure your personal files are safe.

2

Establish Connection

Use a high-quality MFi-certified cable to connect your device to your Mac or PC.

3

Verify Security

Temporarily disable Find My in your iCloud settings to allow the restoration process to proceed.

4

Initiate Restore

Hold Option (Mac) or Shift (PC) while clicking Restore in Finder/iTunes, then select your downloaded IPSW.

5

Finalize Setup

Once the installation completes, follow the on-screen prompts to restore your data from your backup.