One (Telekom Slovenija Group)
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| Company type | Public | 
|---|---|
| Industry | Wireless Services; Telecommunication | 
| Founded | 2003 as Cosmofon | 
| Defunct | 2015 | 
| Fate | Merger with Vip operator | 
| Successor | one.Vip | 
| Headquarters | Skopje, Macedonia | 
Key people  | Olliver Poncin (CEO) Dejan Kalinikov (COO) Lea Benedejcic (CCO)  | 
| Products | Mobile networks, Telecom services, etc. | 
| Owner | Telekom Slovenije | 
| Website | Official site | 
One was a Macedonian GSM/UMTS mobile operator. The company was under a 100-per-cent ownership of Telekom Slovenije. The network of One was covering 99,9% of the population and 98,17% of the territory of Macedonia with quality signal.
One has launched the first DVB-T in Macedonia, BoomTV.
One used to host its network at a mobile virtual network operator called Albafone. It started operations in 2013 and ceased operations in 2015.
In 2015, One merged with Vip operator into one mobile network operator - one.Vip, under the name Vip, with Telekom Austria (Vip) having an equity interest of 55% and Telekom Slovenije (One) having an equity interest of 45%. The agreement includes options for the exit of the Telekom Slovenije Group within three years of the transaction's closing date.
In November 2017, One was sold to Telekom Austria.
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