Download iOS 10.2.1 (14D27) for iPhone 5s (Global)

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPhone6,2
iOS Version 10.2.1
Release Date 2017-01-23
Update Date 2017-01-13
Sha1sum
7d93ed2ea56ca0816075f5a88061778059624004
Sha256sum
2411c0dccb0d18476d5fd65e2b2777d0afeaed12f60cc58aa4627f3281d775ec
md5sum
10df1216658f7e914be63ce36a81468f
Size 2.18 GB
FileName
iPhone_4.0_64bit_10.2.1_14D27_Restore.ipsw
Status

Download IPSW (2.18GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iOS 10.2.1 includes bug fixes and improves the security of your iPhone or iPad.

It also improves power management during peak workloads to avoid unexpected shutdowns on iPhone.

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/HT201222