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2. iPhone 13 - Wikipedia

   en.wikipedia.org/wiki/IPhone_13

   The iPhone 13 features a 6.1-inch (155 mm) display with Super Retina XDR OLED technology at a resolution of 2532×1170 pixels and a pixel density of about 460 PPI with a refresh rate of 60 Hz. The iPhone 13 Mini features a 5.4-inch (137 mm) display with the same technology at a resolution of 2340×1080 pixels and a pixel density of about 476 PPI.

3. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA.

4. Code-division multiple access - Wikipedia

   en.wikipedia.org/wiki/Code-division_multiple_access

   Multiplexing. Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth).

5. iPhone - Wikipedia

   en.wikipedia.org/wiki/IPhone

   The iPhone 13, 13 Mini, ... Apple issued an update for iOS (version 4.3.3, or 4.2.8 for the CDMA iPhone 4) which reduced the size of the cache, encrypted it, ...

6. List of Apple codenames - Wikipedia

   en.wikipedia.org/wiki/List_of_Apple_codenames

   AirPods Max – B515[5] AirPort Base Station (1999) – Pogo. AirPort Express 802.11n (5th generation) – K31[6] Apple IIe Card for the Macintosh LC – Double Exposure. Apple II 3.5" Disk Controller Card – NuMustang. Apple Color OneScanner 600/27 – Rio. Apple Color OneScanner 1200/30 – New Orleans. Beats Flex – B372.

7. iPhone hardware - Wikipedia

   en.wikipedia.org/wiki/IPhone_hardware

   The iPhone has a minimal hardware user interface, with most models featuring five buttons. The only physical menu button is situated directly below the display and is called the "Home button" because its primary function is to close the active app and navigates to the home screen of the interface.