5G on band 1 will take five years atleast. 5G on 900Mhz(if Airtel doesn't invest in 5Mhz of 700Mhz in next auction), then 5G on 2300Mhz(30 or 40Mhz of 2300Mhz) and then 5G on 1800Mhz. 5G on 1800Mhz will be last as lot of spectrum will get freed during 2024-2026 from Vi, so Airtel will try to make it 20-30Mhz and using it for upload. Airtel will achieve blanket coverage by 2028, not before that.