T-Mobile Poland has launched a new prepaid offer. For PLN 25, customers get unlimited calls and SMS and 10 GB for a month. The package is renewed after a top-up of PLN 25. Reports Telecompaper that Customers can add more data of 1, 3 or 5 GB for respectively PLN 5, 9 and 12. New customers who port their number to T-Mobile get the offer free for 30 days after the first top-up.