iPhone5 blue tint line

Looks like burn-in to me. Maybe your screen is starting to fail?

HARDWARRIOR said:

Just curios what can it be? May be somebody saw something like this?
Phone did not take any serious damage. I'm wearing it in front pants pocket, so no pressure on it. Though it dropped recently on floor while hanging on thunderbolt cable that was passed to me) But there was even no scratch. So I did not pay attention. Also I can't say that right after that fall it got that blue line

Click to expand...

I don't know. But there doesn't need to necessarily be any damage for a part to fail. Parts fail all the time for no reason. I myself am on my third iPhone 5.

In the old days of CRT monitors if you left an image on the screen for too long without changing it you could get burn-in. When that happened there was a ghost of that image that was left on the screen for too long and you could never get rid of it even though the CRT still worked.

That's just what this looks like to me. In any case, take it to Apple and ask them to check it. Checking is free and they can tell you what it might cost if it needs a repair. They won't do anything unless you authorize them to.