The Central Bureau of Investigation (CBI) and the Enforcement Directorate (ED) filed several cases against various telecom companies, government officials, and politicians.

The 2G scam serves as a critical example of the challenges in regulating rapidly growing industries and the need for transparent and accountable governance mechanisms.

However, the process was marred by corruption and crony capitalism. Several telecom companies were given licenses and spectrum allocations at significantly undervalued prices. This scam, which came to light fully around 2008-2009, was estimated to have caused a loss of approximately ₹1.76 lakh crore (approximately $39 billion USD) to the Indian exchequer, based on the calculations by a Joint Parliamentary Committee (JPC) and the Comptroller and Auditor General (CAG) of India.

The scam led to significant reforms in the telecom sector. The government implemented changes in the way spectrum was allocated, shifting from a first-come-first-served basis to an auction system, ensuring a more transparent process.

As for 'filmyzillascam 1992 fixed', without more specific information, it's challenging to address directly. However, any scandals or issues related to film industries and their interactions with telecom or other sectors would likely need to navigate similar paths of investigation, legal action, and reform to ensure accountability and justice.