FASTag can be purchased from all national highway fee plazas, regional transport offices (RTOs), transport hubs, common service centres, as well as petrol pumps, according to the Ministry of Road Transport and Highways
Source

FASTag can be purchased from all national highway fee plazas, regional transport offices (RTOs), transport hubs, common service centres, as well as petrol pumps, according to the Ministry of Road Transport and Highways
Source