Airtel — issue with 4g internet connection

Address:	248007
Website:	www.airtel.in

Hi, i am gaurav from dehradun, uttarakhand. I have been using airtel for many years. The internet speed was brilliant when i was using 3g connection but as and when i upgraded to airtel 4g it is really getting annoying day by day.
For facts and hardware concerns let me be clear i have a nokia 6 fully compatible with 4g/lte. The main problem is i have full signal strength but the quality of internet speed i am getting after 6 p. M. Is very low that i have to switch to jio network at night. No doubt i have seen downloading speed over 3mb/s in this same phone with same airtel 4g connection and at same location. At night it is really annoying to use airtel even for surfing.
I look forward for your reply with a valid solution to my problem for now i am using jio connection but i would always prefer airtel if you provide customer the quality of service what they pay for.
Thanks