T-Mobile International AG is the holding company (belonging to Germany’s Deutsche Telekom AG) that oversees various mobile communication networks (both wholly owned subsidiaries and partially owned) around the world.

Headquarters: Bonn, Germany

Operates: GSM and UMTS cellular networks

Countries where the T-Mobile brand is present:

• Germany
• United Kingdom
• United States
• Puerto Rico
• US Virgin Islands
• Austria
• Croatia
• Czech Republic
• Hungary
• Macedonia
• Montenegro
• Netherlands
• Poland
• Slovakia

Subscribers: 150 million

Other ownership stakes:

• Albania – AMC
• Bulgaria – Globul
• Bosnia and Herzegovina – HT d.d. (ERONET)
• Greece – Cosmote
• Romania – Cosmote

Click here to unlock a Blackberry locked on a T-Mobile wireless network.