Complex sentence: When the company was privatized on 1991, the company has experienced a constant transformation to become a competitive company, with high quality levels in the supply of its products and services of voice transmission, data, access to Internet, cellular telephony and directories of information.
Split into simpler sentences: When the company was privatized on 1991, the company transformed into a competitive company, with high quality supply of its products and services. These services include voice transmission, data, access to Internet, cellular telephony and directories of information.