Telesystem International Wireless (TIW) subsidiaries MobiFon (Romania) and Oskar Mobil (Czech Republic) have announced their year end operating statistics, which show that at the end of December they had 4.91 million and 1.83 million customers respsectively. MobiFon’s pre-paid customers accounted for 65.7% of the total while the figure for its sister company stood at 52.1%.