But what should you do without SHSH backup? This tutorial can guide you to downgrade iPhone 4 to iOS6.1.3 without SHSH blobs. Actually iPhone 4 with SHSH backup can be downgraded to any compatible firmware using 3uTools. The iPhone 4 was discontinued in September 2013.Some users want to downgrade iPhone 4 from iOS7 to iOS6, but Apple has closed its signing. In September 2012, the subsidized price was dropped to zero. In October 2011, with the introduction of the iPhone 4S all models were replaced with a single 8 GB model (in white or black), for $99 with a 2-year contract (for AT&T or Sprint), or $549 without. Due to manufacturing and quality problems, the white iPhone did not ship until April of 2011. The iPhone 4 was sold in two models, keeping the same price-points as the iPhone 3GS the year before: a black 16 GB model for $199, and white or black 32 GB models for $299, including a 2-year contract. In addition, the iPhone 4 included a new video calling feature, called "FaceTime," and the capability for 720p 30 fps HD video recording and editing. The iPhone 4 included the newly re-branded iOS 4.0, which brought a number of improvements, including multitasking and folders. Under-the-hood improvements included the afore-mentiond A4 processor, a faster graphics subsystem, improved battery life, and a 3-axis gyroscope which, when combined with the existing accelerometer, provided 6-axis motion detection. Apple claimed that the new display, branded the "Retina display," was so high-resolution that at at standard reading distances, the human eye would be unable to distinguish individual pixels. External improvements included a slimmer, redesigned case, a 5 megapixel camera with LED flash, a VGA-quality front-facing camera, and a stunning new 960圆40 LED-backlit display. Introduced in June 2010, the iPhone 4 replaced the iPhone 3GS, and included the same Apple-designed A4 processor found in the iPad. Sensors: Accelerometer, Proximity sensor, Ambient light sensor, Three-axis gyro Video Out: composite, component, VGA (via Dock Connector adaptors)Ĭamera: 5 MP back (w/LED flash), VGA front Level 1 Cache: 32 kB data, 32 kB instruction
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