What are the visa & residency requirements in Mumbai?

"In order to visit Mumbai, travelers must obtain a visa prior to their arrival. The process of applying for a visa involves submitting an application form, providing a valid passport, and paying the applicable visa fee. Depending on the type of visa, additional documents may be required. In order to obtain residency in Mumbai, India, applicants must submit an application form, provide a valid passport, and pay the applicable fee. Depending on the type of residency, additional documents may be required. Additionally, applicants may need to provide proof of employment, proof of financial stability, and proof of accommodation," mentioned another expat when asked about moving to Mumbai, India.