Hardik Patel is leading an agitation seeking reservation for the Patel community in Gujarat.
Internet services on cellphone in parts of Gujarat - which was suspended on Saturday morning with the detention of Patel leader Hardik Patel -- was resumed in most cities, including Ahmedabad, Gandhinagar, Vadodara and Surat, by Sunday evening.
Mr Patel - one of the leaders of the Patel community which is demanding reservation in jobs and education -- was detained in Surat, where he tried to hold a protest rally. Later, he was formally arrested on charge of defying prohibitory orders, and then released on bail.
The government suspended the mobile internet services after reports that his arrest had triggered sporadic incidents of violence and protests.
Last month, the Patel agitation had gone out of hand after Mr Patel put the state government on notice in several hard-hitting speeches. But after he was detained following a rally on August 25, violence had erupted across the state in which 10 people had died.
Paramilitary forces had to be stationed in various districts to control the mobs and then too, the state administration had banned mobile Internet services for around a week to prevent rumours.
This time, in the middle of his negotiations with the government, Mr Patel had decided to hold the rally that had been put on freeze.
Residents of some Patel-dominated villages had withdrawn their deposits from the bank and banned the entry of political leaders.
The wealthy and influential Patel community had been agitating for quota in education and government jobs - a demand that the Anandiben Patel government had turned down.