Currently Türk Telekom's TTNET ADSL2+ service is the most widely used Internet service in Turkey, offering speeds from 8 Mbit/s to 24 Mbit/s. TTNET offers VDSL2 service with speeds at 25 Mbit/s to 100 Mbit/s as well. Alternative broadband companies, while mostly still using TTNET infrastructure, such as SmileADSL and Biri are also available. Superonline is offering fibre broadband in limited areas in 12 cities, though the company is enlarging at a healthy pace. They currently offer up to 1000 Mbit/s speeds. Furthermore, relatively wide but not universal coverage of cable Internet is maintained by UyduNET, offering speeds from 10 Mbit/s to 100 Mbit/s.