Title: IPhone SE (1st generation)
Content:  The first-generation iPhone SE (also  known as iPhone SE 1 or iPhone SE 2016; SE is an initialism for Special Edition ) is a smartphone that was designed, developed, and marketed by Apple Inc. It is part of the 9th generation of the iPhone alongside the higher-end iPhone 6S and 6S Plus. Pre-orders began on March 24, 2016. It was officially released on March 31, 2016. It was re-released on March 24, 2017 with larger storage capacities. The iPhone SE shares the same physical design and dimensions as iPhone 5S, and has upgraded internal hardware, including the newer Apple A9 system-on-chip, greater battery capacity, and a 12-megapixel 
Title: IPhone SE (2nd generation)
Content:  The second-generation iPhone SE (also known as the iPhone SE 2 or the iPhone SE 2020) is a smartphone designed and developed by Apple Inc. It is part of the 13th generation of the iPhone, alongside the iPhone 11 and 11 Pro/Pro Max models. Apple announced the second-generation iPhone SE on April 15, 2020, coinciding with the discontinuation of the iPhone 8 and 8 Plus. The iPhone SE succeeded the smaller and lighter first-generation iPhone SE. Pre-orders began on April 17, 2020, and the phone was subsequently released on April 24, 2020. It was released with a starting price of US$399, and positioned as a budget phone. Following the pattern 
Title: IPhone SE (1st generation)
Content:  Silver, Gold, and Rose Gold. On March 25, 2019 Gizmodo reported that iPhone SE was back in Apple's clearance shop, and added, that "it's likely the last of Apple's stock that the company has finally put on clearance." On April 15, 2020, the second-generation iPhone SE was announced as the successor to both the original first-generation iPhone SE and iPhone 8/8 Plus. The second-generation iPhone SE was released on April 24, 2020. However, the 2020 iPhone SE has a larger 4.7 inch screen size, leaving the original iPhone SE as the last iPhone to have the smaller 4.0 inch screen size.
Title: IPhone SE (2nd generation)
Content:  The iPhone SE was originally supplied with iOS 13.4, supporting Apple Pay and Apple Card. iOS 13.4.1, an update fixing bugs related to Bluetooth and FaceTime, was released on April 23, 2020 (a day prior to the device's official release), making it a day-one software update. The iPhone SE supports iOS 15.
Title: IPhone SE (1st generation)
Content:  camera that can record up to 4K video at 30 frames per second. Like the iPhone 6s, the iPhone SE can shoot Live Photos and has features like Retina Flash, and the option to have Hey Siri activated, without the need to be plugged into a power source. The iPhone SE was discontinued by Apple on September 12, 2018. The 1st generation SE, alongside the 6S and 6S Plus, are the only iPhones to be supported through seven major versions of iOS, from iOS 9 to iOS 15. Its successor, the second-generation iPhone SE, was announced on April 15, 2020, and released on April 24, 2020.
Title: IPhone SE (2nd generation)
Content:  A successor to the first-generation iPhone SE had been a source of rumor stemmed in 2017, the year after original was released. The name was also subject to speculation. Guesses included (most prevalently) iPhone SE 2, iPhone SE 2020, and iPhone 9 due to design similarities with the iPhone 8. In March 2020, cases for the phone were reportedly being supplied to Best Buy, showing an iPhone with an iPhone 8-sized body and a single camera lens. Belkin screen protectors for the iPhone SE were also listed on the online Apple Store, cross-compatible with the base models of the iPhones 6, 6S, 7, and 8. However, references to the iPhone SE were quickly removed. On April 15, 2020, the second-generation iPhone SE was announced in a press release note on Apple's website. It was marketed as "A powerful new smartphone in a popular design", and was released worldwide on April 24, 2020.
Title: IPhone SE (1st generation)
Content:  iPhone SE originally shipped with iOS 9.3, supporting iPhone 6- and 6S-exclusive features such as Apple Pay, Live Photos, Retina Flash, and always-on Siri voice activation. The SE is compatible with iOS 15. During the WWDC 2019 Keynote, Apple announced, that iPhone SE, 6S, and 6S Plus would support most of the main features of iOS 13. This includes the new dark mode (which aims to reduce eye strain), and Low Data Mode for restricting background network (both Wi-Fi and mobile network) usage. Along with iPhone 6S and 6S Plus, iPhone SE is the oldest iPhone to support iOS 13, iOS 14, and iOS 15. 
Title: IPhone SE (1st generation)
Content:  SE was announced during the September 12, 2018, Apple Special Event, and Business Insider stated that "Apple made a big mistake by removing its smallest and most affordable iPhone from its lineup", suggesting that the company was disregarding a significant number of customers who had been worried over the loss of the smaller design. This was affirmed by Computerworld, who claimed that "the harsh reality is that across some of Apple's biggest markets, wage growth has stagnated, and people are feeling the pinch", further stating that there will always exist consumers in the mid-tier smartphone markets. In relation with the discontinuation 
Title: IPhone SE (1st generation)
Content:  iPhone SE incorporates the Apple A9 system-on-chip (SoC) with an M9 motion coprocessor and supports near field communication for Apple Pay. It was originally released with 16 GB or 64 GB of internal storage. It features a 12 megapixel rear-facing camera with the ability to record 2160p (4K) video at 30 frames per second and slow motion with 1080p at 120fps and 720p at 240fps options. The camera lacks optical image stabilization. Unlike iPhone 6s and 6s Plus, the SE does not include 3D Touch, nor the updated faster second-generation Touch ID sensor from the 6s and 6s Plus, or its barometer. Still photos with 6.5 megapixels (3412×1920) can be captured during video recording. On March 21, 2017 Apple announced that it would double the storage for these models at the same launch prices. The upgraded models were released on March 24, 2017 with 32 GB or 128 GB of internal storage.
Title: IPhone 6
Content:  announced the iPhone 7 and iPhone 7 Plus. Their spot as the entry-level iPhone was replaced by the first-generation iPhone SE, which was released earlier on March 31, 2016. The iPhone 6 was relaunched with 32 GB of storage in Asian markets in February 2017 as a midrange/budget iPhone. It was later expanded to Europe, before hitting the US markets in May 2017, and Canada in July 2017. The iPhone 6 and 6 Plus supported iOS 8, 9, 10, 11 and 12 before being dropped by iOS 13, and they are the third to support five versions of iOS after the iPhone 4S and the iPhone 5.

Question: when did the apple iphone se come out?
Answer: March 31, 2016.
March 21, 2016.