1. Dharavi is a famous and vibrant neighborhood located in Mumbai, India. It is known as one of the largest slums in Asia, but it is also a thriving commercial and industrial area. Spread over an area of approximately 2.1 square kilometers, Dharavi is home to a diverse mix of people from different religious, cultural, and linguistic backgrounds.

Despite its reputation as a slum, Dharavi is known for its entrepreneurial spirit and is considered a hub for small-scale industries. It is estimated that the annual turnover of businesses in Dharavi is around $1 billion. The area houses numerous factories and workshops that produce textiles, pottery, leather goods, and a variety of other products. Dharavi is also known for its thriving recycling industry, with workers involved in the sorting and processing of recyclable materials.

Dharavi has been featured in several popular movies, including the critically acclaimed film \"Slumdog Millionaire.\" The neighborhood has also gained international recognition as a case study for urban development and poverty alleviation.

2. Dharavi does not have specific working hours or a central office. It is a residential and commercial area where businesses operate according to their own schedules. As such, there is no official phone number for Dharavi.

However, if you are interested in visiting Dharavi, it is recommended to join a guided tour. Several tour companies offer guided tours of the neighborhood, providing visitors with insights into the local industries, lifestyles, and culture. These tours typically last for a few hours and can be booked in advance. They often include a visit to local businesses and residential areas, allowing visitors to interact with the residents and learn about their way of life.

3. There is no entry fee or ticket required to visit Dharavi. However, joining a guided tour may incur a fee, which varies depending on the tour operator and the package offered. Transportation to Dharavi can be easily arranged via taxis, auto-rickshaws, or local buses. It is located in the heart of Mumbai and is well-connected to the city’s transportation network.