reena277 Said:
"Phone screen: Why my phone screen turn into blue colour this is happen 3-4 time . For few seconds it’s turn into blue all icons get blue and after few seconds it turns to normal . I try to take screen shot but when I check screen shot it’s looks normal ."
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Your Screen is Failing.
From what you have reported, your screen is apparently failing. So, It is time fro a new screen. If you have not had this replaced, then it might be replaceable by Apple.
Perhaps this is a Faulty Device?:
How old is this iPhone? You have a one-year, out-of-the-box, limited-warranty with this. So, if it is covered under warranty, then see if you can get the screen replaced. Ask Apple Support for a new screen.
--- Contact Us - Choose Locations
--- USA: 1(800)MY-APPLE
--- Proceed from there as Necessary
NOTE: Due to the Coronavirus Pandemic, calls are taking a bit linger to get through. And, that makes sense, because many are at home working out-of-the-house or are taking classes over-the-web, this they have more time on their hands to contact Apple Support. So, it might take a bit to get through to Apple Support. But, just stay on the line, and someone will be with you.