Airtel — 4g internet speed is not good

Address:

Bangalore, Karnataka

I am using airtel postpaid connection since a long time but from the past 1 or 2 months, i am getting my airtel 4g speed very low. It was good before but i am not sure what happened after that. I am having lots of gb data and its keep on adding every month but i can't use it because of lack of internet speed. I am not sure what to do instead of looking for other service providers and switch from airtel to someone else to get better services.