Choose aProduct→Choose aPlatform→Choose aVersion→ClickDownload

Download 8.3 (12F70) for iPhone 6+

Version:	8.3
Build:	12F70
Signed:	No
Size:	2.21 GB
Release Date:	2015-04-08 19:19:37
Upload Date:	2015-04-04 18:09:43
SHA1:	f9ecef7423a38040ce4b4e83d51567e30732da32
MD5:	8c0564585c48f6b55b75ec693ef47e74
SHA256:	6b0f64941d50779bdc1be3bf5862443e8c849b46d66cbb3c2c46afba44c12f7e

Secure download directly from Apple's servers

IPSW Portal