I have an iPhone 6 plus which has its screen coming off for sometime now. The screen was replaced after I broke the original one a year ago. Now I have visited a few repair shops and have been told that the battery is fine. And the screen can either be glued back or replaced. Two of them have warned that while they can glue back the screen, there is a high chance that it will not work after that. They are saying that there is a glass chip that will most probably break and cannot be replaced. Is it true?