No. Vivo Y17 is not a 5G mobile phone. It supports 4G, 3G & 2G GSM networks.
No. Vivo Y17 does not have an LED notification light.
Yes, Vivo Y17 does have fast charging support. It handles 18W fast charging.
No. Vivo Y17 does not have an NFC sensor.
Yes, Vivo Y17 does have the hybrid sim slot. But you do not require to worry about the internal storage. As the phone comes with huge 128GB internal storage.