VIVO/IQOO HAS THE BEST SERVICE CENTER!!

My phone(iQOO 9t) suddenly had a green line , and the service center literally replaced it under 2 hrs, and u know what's crazy? I didn't have to pay a single dime, they replaced the screen for free, even tho my phone's back was broken and all, but the service center guy just told me it doesn't matter and did it for free.