Airtel has high possibility, jio also has possibilities.
For Jio, 1.6Mhz is immediately available for whole TN, 0.4Mhz immediately available in CHN, 1.2Mhz immediately available in RoTN.
So taking CHN alone in account, totally 2Mhz immediately available for CHN. And 1.2Mhz unsold.
Jio already has 6.8Mhz already with them, so remaining 3.2Mhz can be formed by 2Mhz immediately available + 1.2Mhz unsold making required 3.2Mhz. So it will make 6.8+3.2 = 10Mhz.
My prediction is for Chennai only.