IOS 11.2 จะเพื่ม Feature ลดความเร็ว CPU Iphone7 ลง ถ้ายังอยากให้เครื่องเร็วเหมือนเดิมให้หลีกเลี่ยงไปก่อน
"Last year we released a feature for iPhone 6, iPhone 6s and iPhone SE to smooth out the instantaneous peaks only when needed to prevent the device from unexpectedly shutting down during these conditions. We've now extended that feature to iPhone 7 with iOS 11.2, and plan to add support for other products in the future."
ที่มา
https://www.macrumors.com/2017/12/21/apple-lawsuit-slowing-down-old-iphone-models/ 
เตือนภัย Iphone7
"Last year we released a feature for iPhone 6, iPhone 6s and iPhone SE to smooth out the instantaneous peaks only when needed to prevent the device from unexpectedly shutting down during these conditions. We've now extended that feature to iPhone 7 with iOS 11.2, and plan to add support for other products in the future."
ที่มา https://www.macrumors.com/2017/12/21/apple-lawsuit-slowing-down-old-iphone-models/