there should be a rule for minimum guaranteed speed on 4g of 10 mbps
A lot of practices abroad are not allowed here. For example in some countries in the 90's a call to a number of a different operator would cost more but was not allowed here though both operators then wanted it.This is a norm in the countries like UK.
TSPs even disable hotpsot feature for certain plans.
Airtel is throttling speeds of Post paid connection in Chennai. I did a speed test in prepaid sim and got 90Mbps and with post paid sim I just got 18 Mbps.They lost lots of postpaid customers due to network integration issues. To get them back this kind of strategy is used. Looks like they will throttle speeds in prepaid connections such a stupid move.
If both are in different phones then check the LTE bandAirtel is throttling speeds of Post paid connection in Chennai. I did a speed test in prepaid sim and got 90Mbps and with post paid sim I just got 18 Mbps.
Same phone with same Band combinations 3+40+40.If both are in different phones then check the LTE band
I have also faced this issue. For me after consuming some data, speed abruptly goes to 2Mbps all of a sudden from 20Mbps.