Following a decade-long ownership dispute with the French Vivendi corporation, the company has been wholly owned by the German telecommunications provider Deutsche Telekom since 2010.

[2] Polska Telefonia Cyfrowa was founded as a company in December 1995, and on 26 February 1996 it won a license to provide telecommunications services paging number 602 and permission to build a mobile radio communication network according to the GSM standard in the 900 MHz band, which was later extended to GSM 1800 MHz.

Towards the end of 2005, Era became the first mobile phone operator in Poland (and eighth in Europe) to have 10 million customers.

[5][6] tuBiedronka is a prepaid mobile phone brand offering by T-Mobile Polska in co-operation with the Polish discount supermarket chain Biedronka.

In October 2012, the company launched a commercial NFC wallet service in Poland called "MyWallet".

[9] In January 2013, T-Mobile Polska started a marketing campaign involving the figure of Vladimir Lenin who was the leader of Soviet Russia during the Polish–Soviet War (1919–1920).

There has even been some suspicion of the company utilising another controversial figure – Adolf Hitler – in a future campaign.

[10] Finally, under the pressure of public opinion and a protest action Heyah Hitler,[11] the campaign was aborted.