Hey Julian,
Thanks for the reply. It suddenly started working. I had to add the APN settings below.
Name: Jio4G
APN: jionet
APN Type: default,supl,xcap
APN Protocol: Ipv4/Ipv6
APN Roaming Protocol: IPv4/Ipv6
# It did work on the OnePlux X which was the original phone that the SIM was...