Sarkar bhai i really dont know why u r getting so low speed on ur Airtel 3G. Must be a location issue. Well i use Vodafone 3G and i get 6-7 Mbps Download speed and 2-3 mbps Upload speed. I also use Jio through hotspot n i get 12-15mbps download n 7-8 mbps upload speed.
It's not location bro. I get very good speed from morning to noon and in night. Prob start only in afternoon to 10 pm and speed is unbearable(slower than 2G) in evening [emoji19]