chromecast needs wifi...so it's not an option for you.
your best option is to get a smart tv....then use your mobile hotspot function....then you can connect your smart tv to your mobile data....but you will not be able to see your netflix on the tv....prime and zee5 can be installed on the tv and you can watch those.
but 1.3 GB limit ullappol oru movie enkilum kanan pattumo ennu samshayamanu....oru moviekku ethandu 2 GB venam