when did hyderabad got independence?

Answer 1

Mughal emperor Aurangzeb captured Hyderabad in 1687. During the short Mughal rule, the fortune of Hyderabad declined. Soon, the Mughal-appointed governors of the city gained more autonomy. In 1724, Asaf Jah I, who was granted the title Nizam-ul-Mulk ("governor of the country") by the Mughal emperor, defeated a rival official to establish control over Hyderabad. Thus began the Asaf Jahi dynasty that would rule Hyderabad until a year after India's independence from Britain.
When India gained independence in 1947, under the terms of independence from the British the State of Hyderabad headed by the Prime Minister, the cabinet and the Nizam opted for independence, either as a sovereign ruler or by acquiring Dominion status within the British Empire.

India then enforced an economic blockade. As a result Hyderabad state signed a Standstill Agreement with the Indian Union. On September 17, 1948, more than a year after India had gained independence, the Nizam signed the Instrument of Accession to the Indian Union.
On November 1, 1956, the states of India were reorganized on linguistic grounds. The territories of the State of Hyderabad were divided between newly created Andhra Pradesh, Bombay state (later Maharashtra), and Karnataka. Hyderabad and the surrounding areas were added to Andhra Pradesh, based on the Telugu speaking community. Thus, Hyderabad became the capital city of the new state of Andhra Pradesh.
http://en.wikipedia.org/wiki/Hyderabad,_Andhra_Pradesh

Answer 2

Integration of the State of Hyderabad and Berar into the Union of India took place on September 12, 1948. T

For ore information, please check the following link:

http://en.wikipedia.org/wiki/Operation_Polo