Carrier Aggregation on Airtel 4G LTE

Earlier Some Airtel towers had older equipments which provided Max speeds of only 50Mbps even on Band 40. Now they've upgraded all the towers here but the speed has gone down. Here in my place there's no Airtel and even no BSNL Fiber. So No Fiber Backhaul for the tower it's still on the wireless Backhaul.
 
But still even though Jio has more users it doesn't stays slow for long time. Speeds differs According to the users. But Airtel once it becomes slow that's it only the next day 2 AM it will become Normal.
 
Maybe there are very less users. But while travelling Jio will be very stable if we lock it to Band 3 and Band 5.
 
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