Carrier Aggregation on Airtel 4G LTE

Airtel Band 3 15Mhz in Andhra Pradesh.
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Ya they need to buy more spectrum in band 3. But why can't vodafone deploy 5Mhz band 3 even after merging with idea.
 
Do you know which network going to be shutdown in Chennai after vodafone-idea network integration in Chennai ?
 
I don't know about it but Vodafone doesn't has Band 3 spectrum in TN. Idea had only 5Mhz spectrum before but suddenly it added extra 5Mhz recently.
 
Actually vodafone has 8Mhz and idea has 11.4mhz band 3 spectrum in TN. Vodafone used 8Mhz for 2G but later liberalised it to use it for 4G after merging with idea. But still it doesn't has a own 1800mhz network.
 
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