Iphone isn’t working
Hello ,
I have an Iphone 8 and it was working fine but suddenly it wouldn’t open any more .
I don’t know what causes this and how to fix it
Question marked as
Top-ranking reply
Nobody knows except the engineer assessing it.
Try this first
Frozen phone
see the process below. Work all through it.
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
then if that fails
https://support.apple.com/iphone/repair/service
Anything other than Screen or Battery may be a replacement phone and the price is in the article, depending on your warranty or AppleCare+ status.
You can see additional service information within the following article:
Get your iPhone, iPad, or iPod touch ready for service - Apple Support