Due to technical difficulties while swapping the equipment with new 3G network, 10,000 Teletalk users have lost their connectivity.
However, the state run operator is replacing the connections.
Habibur Rahman, general manager, sales and marketing of Teletalk, said some 10,000 customers' data has been lost from the authentication centre of the company so they have become out of network.
He said it was not possible to recover the data so the company is replacing the SIMs of those customers and the company has already replaced around 2,500 SIMs.
These 10,000 connections are the first customers of Teletalk, he said.
At the same time, Teletalk users are facing disrupted connectivity due to the swapping process, said its officials.
The company has a total of 14 lakh active customers.