PM Modi connected with the party workers on their mobile phones through the "audio bridge" technology and extended Diwali greetings to them, a BJP release said.
He also spoke to around 2,000 party workers in his Parliamentary constituency, Varanasi, using the same technology.
PM Modi told the party workers in Gujarat that the development-oriented policies of the ruling BJP in the last 22 years in the state had made development the main point in today's national politics.
He said the people of Gujarat were emotionally attached to the saffron party because they were "progressive and development-oriented".
The people of Gujarat reposed their faith in the BJP because they knew that truth was on its side, PM Modi said.
Addressing the party workers in Varanasi, the prime minister said their contribution was significant in the development of the region.
The policies of the Centre had provided new opportunities to those coming from villages, cities, as well as the poor, farmers, Dalits, women and youth, he added.