RAIPUR, India — Forget the old American campaign slogan of a chicken in every pot, or the Indian politician’s common pledge to put rice in every bowl.

Here in the state of Chhattisgarh, the chief minister, Raman Singh, has promised a smartphone in every home — and he is using the government-issued devices to reach voters as he campaigns in legislative elections that conclude on Tuesday.

Chain Sahu, a mother of two who cooks at a school on the outskirts of Mr. Singh’s district in Rajnandgaon, said her free phone rang last Sunday, just before her village voted. The caller, who claimed to be from “the Raman government,” asked if she had benefited from government programs and urged her to vote for Mr. Singh’s Bharatiya Janata Party. When she complained about her pay and work conditions, she recalled, “They said, ‘We’ll carry your concerns to Raman.’”

The phones are the latest twist in digital campaigning by the B.J.P., which controls the national and state government and is deft at using tools like WhatsApp groups and Facebook posts to influence voters. The B.J.P. government in Rajasthan, which holds state elections next month, is also subsidizing phones and data plans for residents, and party leaders are considering extending the model to other states.