Yes, Smartron SRT Phone does have the LED notification light.
Yes, Smartron SRT Phone is a metal body phone. It is made of Aluminium Alloy.
Yes, you can record 4K videos on Smartron SRT Phone.
Yes, Smartron has already announced that they are going to release Android Oreo update for SRT Phone customers in January 2018.
Yes, Smartron SRT Phone does have the fingerprint scanner.