Under the offer, customers of itel feature phones priced between Rs 800 and Rs 2,000 will get free talktime of Rs 50 for 18 months on minimum recharge of Rs 100 every month.
The offer will be available for both new and existing Vodafone subscribers on new itel feature phones, Vodafone said in a release.
It has come at a time when rival Reliance Jio has launched pre-booking of an "effectively free" device, targeting customers in rural areas and those spending low on mobile services.
"This collaboration will enable our existing and prospective customers to make the most out of their new device purchase," Vodafone India, consumer business, associate director, Avneesh Khosla said in a statement.
"... Itel customers will now be entitled to avail unprecedented cash-backs from Vodafone on purchasing itel feature phones," itel Mobile India CEO Sudhir Kumar said.