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Cambios a Paso #3

Editado por Miroslav Djuric

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[* black] The SIM slot is gone. According to Apple, the SIM card and SIM tray were the only user-servicable parts in the AT&T iPhone 4. Apple now says "iPhone does not contain any user-servicable parts." We believe you have the [link|http://www.ifixit.com/Manifesto|right to repair your own hardware], and we'll have a repair guide available right away.
[* black] TheWe believe the additional break in the antenna enclosure on the right side of the phone is a result of the switch from GSM to CDMA. An antenna's operating frequency is directly dependent on its size and geometry, so the change-up required an antenna overhaul.
[* black] The SIM slot is gone. According to Apple, the SIM card and SIM tray were the only user-servicable parts in the AT&T iPhone 4. Apple now says "iPhone does not contain any user-servicable parts." We believe you have the [link|http://www.ifixit.com/Manifesto|right to repair your own hardware], and we'll have a repair guide available right away.
[* black] TheWe believe the additional break in the antenna enclosure on the right side of the phone is a result of the switch from GSM to CDMA. An antenna's operating frequency is directly dependent on its size and geometry, so the change-up required an antenna overhaul.
[* black] The AT&T GSM iPhone has three differently shaped antennas, which enable the phone to communicate on UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz) and GSM/EDGE (850, 900, 1800, 1900 MHz).
[* black] The CDMA iPhone, which has four antenna segments (two "U" shaped pieces at the top and bottom, and two straight bars along the edge) only needs to operate on 800 and 1900 MHz for CDMA EV-DO Rev. A.
[* black] Both phones use 2400 MHz frequencies for Bluetooth and 2.4 GHz for WiFi and the 1.575 GHz frequency for A-GPS.
[* black] Whether or notOnly time will tell if this new antenna design willhelps combat the reception problems previously plaguing the GSM iPhone, or if Apple still thinks [http://news.yahoo.com/s/ytech_gadg/20100630/tc_ytech_gadg/ytech_gadg_tc2970|it is not a big deal] will have to wait to be decided via experimental testingiPhone 4.
[* black] Whether or notOnly time will tell if this new antenna design willhelps combat the reception problems previously plaguing the GSM iPhone, or if Apple still thinks [http://news.yahoo.com/s/ytech_gadg/20100630/tc_ytech_gadg/ytech_gadg_tc2970|it is not a big deal] will have to wait to be decided via experimental testingiPhone 4.