Download iOS 8.3 (12F70) for iPhone 6+

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 iPhone7,1
iOS Version 8.3
Release Date 2015-04-08
Update Date 2015-04-04
Sha1sum
f9ecef7423a38040ce4b4e83d51567e30732da32
Sha256sum
6b0f64941d50779bdc1be3bf5862443e8c849b46d66cbb3c2c46afba44c12f7e
md5sum
8c0564585c48f6b55b75ec693ef47e74
Size 2.21 GB
FileName
iPhone7,1_8.3_12F70_Restore.ipsw
Status

Download IPSW (2.21GB) Check device info
Release Notes

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

This release includes improved performance, bug fixes, and a redesigned Emoji keyboard. Changes include:

Improved performance for:

Wi-Fi and Bluetooth fixes

Orientation and rotation fixes

Messages fixes

Family Sharing fixes

CarPlay fixes

Enterprise fixes

Accessibility fixes

Other improvements and bug fixes

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222