iOS 11 est compatible avec les appareils suivants
https://books.google.com.tw/books?id=xFS_BAAAQBAJ&pg=PA329&lpg=PA329&dq=iphone+5c+compatible+ios+11&source=bl&ots=P0vhxtEwTx&sig=ACfU3U21emMeax6J07fVlPYJso8qdTGscQ&hl=en&sa=X&ved=0ahUKEwiWlMLMjcDkAhUSJqYKHYB2AyM4ZBDoAQiMATAX https://www.anandtech.com/show/14485/apple-ios13-compatibility-starting-with-the-6s http://rivercitybusinessnetwork.com/51sdxp/iphone-4-ios-9.html http://tesheralevye.com/mrqy/ios-10-compatibility.html http://kspromocional.com.br/xsh4/44up2v.php?oi=h3lix-jailbreak-website http://danielkripper.com/ojb/h3lix-no-computer.html http://visionmediatechnology.com/zjpx/9oz4.php?xu=why-wont-my-iphone-update-to-ios-11
https://www.wired.co.uk/article/ios-11-features-update-download-release-date-uk https://macreports.com/how-to-install-apps-on-older-devices-running-older-versions-of-ios/ https://apple.stackexchange.com/questions/367247/iphone-5c-cant-install-netflix-because-ios-11-is-required https://everyi.com/by-capability/maximum-supported-ios-version-for-ipod-iphone-ipad.html https://www.gottabemobile.com/7-things-to-know-about-the-iphone-5s-ios-12-1-update/ https://www.lifewire.com/devices-compatibility-ios-9-1999748 https://www.google.com/search?num=100&q=iphone+5c+compatible+ios+11&tbm=isch&source=univ&hl=en&sa=X&ved=0ahUKEwjNkZDKjcDkAhW3yIsBHXXBARQQsAQI4gE
https://ifile-app.com/ifile-ios/ https://www.ipadizate.es/2017/06/07/ios-11-iphone-5c/ https://wccftech.com/download-ios-11-final-ipsw/ https://hirslibilisim.com/gbpj/7kslnt.php?tre=ios-10-download-for-ipad-2 https://www.phonescoop.com/articles/article.php?a=19189
http://aulasescolares.uta.cl/corfo/wp-content/themes/aeonblog/rwmli/program-touch-id-iphone-5s.html http://soulharboursoap.ca/sq159/ludmw0.php?kd=charging-animation-tweak-ios-11 http://www.metacondo.com/nkd4qukwxq/ipa-apps-ios-7.html http://karthik.asia/be2xsfr/dx0fdp.php?kg=h3lix-jailbreak-website http://troyerproperties.com/g5jx6/ios-64-bit-deadline.html https://studiocurreli.com/2yrz/ota-iphone-unlock.html http://design.circadian-ca.com/i5k/ipa-apps-ios-7.html
IPhone 5c имеет 32-битный процессор, а iOS 11 отказался от 32-битной поддержки и будет работать только на 64-битных процессорах.Во-первых, как отметил Майк Скотт, iPhone 5c имеет 32-битный процессор, а для iOS 11 требуется 64-разрядный процессор.