Dropped my Razr 50 ultra hot pink

So I've had my Razr 50 ultra hot pink for 5 months been an amazing phone except it gets really warm easy I dropped it closed from 8 inches onto plastic the cover screen didn't crack but it started to turn rainbow colors as if it had a water droplet on it inner screen was perfect TMoble gave me a new one with my insurance for a $ 99.00 deductable but man 8 in drop really