Direct links for iOS 8 beta 4 inside.
To install any iOS 8 beta you must have your UDID activated.
iPhone 5S (A1457 / A1518 / A1528 / A1530) iOS 8 Beta 4
iPhone 5S (A1453 / A1533) iOS 8 Beta 4
iPhone 5C (A1507 / A1516 / A1526 / A1529) iOS 8 Beta 4
iPhone 5C (A1456 / A1532) iOS 8 Beta 4
iPad Mini (A1490) iOS 8 Beta 4
iPad Mini (A1489) iOS 8 Beta 4
iPad Mini (A1432) iOS 8 Beta 4
iPad Mini (A1491) iOS 8 Beta 4
iPad Mini (A1455) iOS 8 Beta 4
iPad Mini (A1454) iOS 8 Beta 4
iPad 2 Wi-Fi (Rev A) iOS 8 Beta 4
iPod Touch 5th Generation iOS 8 Beta 4