Why iphone 4 dropped calls?

The iPhone 4 is the fourth model of the iPhone, iPhone 3G successor, presented June 7, 2010 at WWDC 2010. The iPhone 4 includes two digital cameras (one main and one front for video conferencing), Assisted GPS device and a media player. The device, in addition to standard services such as telephone calls, SMS and MMS, can use services such as e-mail, web browsing, Visual Voicemail, can manage a Wi-Fi is controlled by the user through a multi-touch screen, motion sensor device (accelerometer and gyroscope), a virtual keyboard, a button to return to the main menu, two small buttons for volume control, one to go from ring and a state of vibration for standby/off. The user interaction is supported by a proximity sensor and an ambient light sensor.

In just three days Apple has sold 1.7 million iPhones 4. Steve Jobs, Apple during the special conference on the problem of the antenna held July 16, 2010, said that Apple has sold about 3,000,000 iPhone 4. On October 18, 2010, during the usual tax on sales of Apple’s conference were presented the data of iPhonesales: 14.1 million iPhones sold until September 2010, an increase of 91% compared to the quarter previous year.

The iPhone 4 brings some long-awaited features to the iPhone table, without trying to do everything the competition can do. The interface, the screen and the camera have all been dramatically improved, but will these be enough to keep Apple at the top of the super-phone pile? With Apple, it’s always the little things that count.

Release date GSM model (black): June 24, 2010
CDMA model (black): February 10, 2011
GSM and CDMA models (white): April 28, 2011.