| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | List of iOS devices - iPhone |  |  |  |  |  |
| 3 | Model | Announced | Released | Discontinued | Unsupported | Months supported to date |
| 4 | iPhone | January 9, 2007 | June 29, 2007; 11 years ago | July 11, 2008; 10 years ago | June 21, 2010; 8 years ago | 35 months |
| 5 | iPhone 3G | June 9, 2008 | July 11, 2008; 10 years ago | June 7, 2010; 8 years ago | March 9, 2011; 8 years ago | 31 months |
| 6 | iPhone 3GS | June 8, 2009 | June 19, 2009; 9 years ago | September 12, 2012; 6 years ago | February 21, 2014; 5 years ago | 56 months |
| 7 | iPhone 4 | June 7, 2010 | June 24, 2010; 8 years ago | September 10, 2013; 5 years ago | September 17, 2014; 4 years ago | 50 months |
| 8 | iPhone 4S | October 4, 2011 | October 14, 2011; 7 years ago | September 9, 2014; 4 years ago | September 13, 2016; 2 years ago | 58 months |
| 9 | iPhone 5 | September 12, 2012 | September 21, 2012; 6 years ago | September 10, 2013; 5 years ago | September 19, 2017; 19 months ago | 59 months |
| 10 | iPhone 5C | September 10, 2013 | September 20, 2013; 5 years ago | September 9, 2015; 3 years ago | September 19, 2017; 19 months ago | 47 months |
| 11 | iPhone 5S | September 10, 2013 | September 20, 2013; 5 years ago | March 21, 2016; 3 years ago | Supported | 67 months |
| 12 | iPhone 6 / 6 Plus | September 9, 2014 | September 19, 2014; 4 years ago | September 7, 2016; 2 years ago | Supported | 55 months |
| 13 | iPhone 6S / 6S Plus | September 9, 2015 | September 25, 2015; 3 years ago | September 12, 2018; 7 months ago | Supported | 43 months |
| 14 | iPhone SE | March 21, 2016 | March 31, 2016; 3 years ago | September 12, 2018; 7 months ago | Supported | 36 months |
| 15 | iPhone 7 / 7 Plus | September 7, 2016 | September 16, 2016; 2 years ago | In production | In production | 31 months |
| 16 | iPhone 8 / 8 Plus | September 12, 2017 | September 22, 2017; 19 months ago | In production | In production | 19 months |
| 17 | iPhone X | September 12, 2017 | November 3, 2017; 17 months ago | September 12, 2018; 7 months ago | Supported | 17 months |
| 18 | iPhone XS / XS Max | September 12, 2018 | September 21, 2018; 7 months ago | In production | In production | 7 months |
| 19 | iPhone XR | September 12, 2018 | October 26, 2018; 6 months ago | In production | In production | 6 months |

Question: Wat were the immediate predecessor and successor of the fourth generation iPhone 4?
Answer: IPhone 4 is the fourth generation iPhone, succeeding the 3GS and preceding the 4S.