IPhone 4
3- axis gyro, accelerometer, proximity sensor, ambient light sensor
GSM, EDGE, UMTS, HSDPA
Wi-Fi, Bluetooth
Dock connector
The iPhone 4 is the fourth (depending on how you count third) generation of the iPhone smartphone series of the U.S. company Apple. It is mainly served by finger contacts on the multi -touch screen. On the device, Apple's iOS operating system is version 4.0 ( CDMA version: Version 4.2.5 ) are used.
Design
The housing consists of a stainless steel frame, which also functions as an antenna. Front and back are made from a sealed and scratch-resistant special glass ( manufacturer's designation Gorilla Glass). The device was initially only available in black, since April 28, 2011, in white. Overall, the iPhone is 9.3 millimeters thick.
Specifications
Mobile and Networking
The iPhone 4 offers UMTS data transmission over HSUPA with up to 5.7 Mbps speed. For Wi -Fi connections it supports IEEE 802.11b/g/n standards, but with 802.11n only operation in the partially busy 2.4GHz band. To operate a micro-SIM card is required.
The topics discussed at the media reception problems of the smartphone dismissed CEO Steve Jobs and referred to a general impairment occurring receipt of smartphones in the solid enclosing the device by hand. This statement together with the admission of a software calculation error, which runs since the iPhone 3G by iOS, has ensured many opposing competitor for outrage.
Since 10 February 2011, the American mobile operator Verizon Wireless is selling the iPhone 4 in the U.S.; This variant uses the mobile standard used by Verizon Wireless in place of GSM / UMTS CDMA2000. The Verizon rival AT & T had to fight since the introduction of the iPhone to congestion and poor coverage of its 3G mobile networks; to substantiate the reliability and coverage of their own networks, Verizon Wireless advertises, among other things explicitly in the iPhone operating system iOS included from version 4.2.5 hotspot feature. This feature allows you to create a Wi-Fi hot spots at the register up to five users and can use the Internet connection of your iPhone. In the CDMA2000 iPhone there is another antenna segment in the steel frame, which is designed to counter reception problems. This antenna design was taken over to the successor, the iPhone 4s. An additional microphone filters out ambient noise and improves voice quality.
Digital and front camera
The digital camera can take pictures with a resolution of 2592 × 1936 pixels ( five megapixels) and videos at resolutions of 1280 × 720 pixels (HD ) at 30 fps and has an LED flash and a five-fold digital zoom. The sensor allows for the first time in mobile phones is a rear exposure, wherein the sensor is located on the back of the sensor and thus a higher sensitivity is achieved. There will also be located on the front of the device another VGA camera for FaceTime function (video telephony) is required. You can take photos and videos with a resolution of 640 × 480 pixels videos at 30 fps.
Processor
When the processor is already known from the first generation iPad, Apple A4 manufactured by Samsung with a reduced core clock of 800 MHz. It connects the CPU ( ARM Architecture), integrated GPU and other parts according to the system -on-a -chip principle. A modified battery will extend in combination with the new processor, the run times by up to 40 percent.
Data storage
The device disposal, depending on the version, a 16 or 32 GB of NAND flash memory for any data and 512 MB of memory - twice as much as the iPad the first generation and the direct predecessor iPhone 3GS. With the introduction of the successor of the iPhone 4 is now only available with 8 GB of flash memory.
Screen
The 3.5 -inch screen referred to Apple as " Retina display " as it with 326 ppi ( 960 × 640 pixels) is more pixels than the eye at normal viewing distance ( about 25 to 30 cm) can barely recognize. Compared to the previous model with 480 × 320 pixels the number of pixels was thus quadrupled. Of which should benefit on the iPhone 4, especially writing and shall be shown clearly sharper. When retina display also the in- plane switching (IPS) technology which Apple is used already in the Apple LED Cinema Display, iMac and the iPad the first generation begins. It provides compared to a conventional TN display for a wider viewing angle. The contrast of the screen should be 800:1, according to Apple, but it is for new devices even more than 1100:1 with a maximum brightness of over 500 cd / m².
Gyroscope
Apple added the iPhone 4 the acceleration sensor is still a three-axis gyroscope in addition, captures the rotations around all three axes and offers especially for games new possibilities.
Video telephony
The iPhone 4 is the first -generation iPhone, which offers a video calling feature called FaceTime. This was unveiled by Apple at WWDC 2010 in June 2010 in real time. FaceTime was first possible only via WiFi, but was later - if by the respective network provider allows it - extended to mobile networks.
Marketing and Sales
The device was unveiled on 7 June 2010 at the WWDC 2010 at the Moscone Center in San Francisco. On 24 June 2010 it arrived in the United States, the United Kingdom, Japan, France and Germany in the shops.
The launch was postponed due to the high demand of over 600,000 pre-orders within the first 24 hours initially. Apple stated that they did not expect such a demand. In the first three days of sales, the iPhone 4 has been sold, according to Apple's 1.7 million times, which were 700,000 more than the iPhone 3GS last year. The pure manufacturing and material costs of the iPhone 4 estimated the market research firm iSuppli, with $ 188 per piece.
Successor to the iPhone 4s, which came on the market in October 2011.
Criticism
After updating to iOS7 complained numerous users speed problems with the iPhone 4 These were 7.1 largely eliminated by Apple due to the update to iOS, but according to the CHIP Online update does not bring back the familiar reaction speed of iOS 6.
End of June 2010 attended reports of reception problems with the new iPhone stir. Two shoppers filed in the District Court of the U.S. state of Maryland a class action lawsuit against Apple and AT & T, since several iPhone 4 users complained about alleged reception problems. Apple initially stated, there existed no unusual problems with reception, but the reception display give the signal strength due to a calculation error in the software partially incorrect again. Apple manifests itself further, that the declining reception even in other mobile phones known with similar antenna design and basically everything was in order. Apple has released an update ( 4.0.1 ) for the correct reproduction of the reception strength. Experts from the U.S. journal Consumer Reports confirmed the reception problems with left-handed and therefore a design flaw in the laboratory with simulated mobile cell and therefore spoke no purchase recommendation. Apple later announced that the reception problems could not be solved by a software update. Consumer Reports advised buyers to solve the problem with tape or use a cell phone pocket. Apple offered a press conference on July 16, 2010 all iPhone 4 buyers either a rescission of the purchase with full refund of the purchase price or a free shell ( "iPhone Car " ) to. Users who had already purchased such were compensated by a subsequent credit, new buyers were given in the context of the iPhone 4 Case Program, which ended end of September 2010, a free sleeve of their choice.
On 11 January 2011 Apple and Verizon Wireless introduced a customized for the mobile CDMA2000 iPhone version, which has according to a technical specification for the Verizon cellular network with two antennas and according to various reports over the GSM / UMTS model had significantly fewer reception problems.