Implementation of FASTag has been moved from December 1st to December 15th owing to the inconvenience to the Motor riders. The extension has brought some respite to the users who were desperately trying to buy one.
FASTag Mandatory: Implementation Date moved to 15th December

FASTag was introduced last year by the Government of India to make the payment of Toll gates faster and reduce congestion. The FASTag is an RFID tag which can be read by the scanners at the Toll gates. The tag is fitted to the front windshield of the car.
The date of implementation which was on December the 1st has now been moved to December 15th after its delivery issues due to the order amount and awareness of the tag.
How can a FASTag be Obtained?

FASTag can easily be obtained. It can be obtained through Offline and Online methods
You can buy it from, among others, a nearby bank branch of State Bank of India (SBI), ICICI Bank, HDFC Bank, and Axis Bank. At select toll plazas and their local branches, as many as 22 certified banks are eligible to issue FASTags through channels such as point-of-sale (POS) machines. These can also be purchased online through the websites of SBI, ICICI, HDFC and Axis Bank.
FASTag is an excellent move by the Government to reduce congestion and in making progress towards a Digital India.