As I mentioned in this thread:
http://www.prepaidgsm.net/forum/inde...showtopic=1203
the 3G operator P4 was going to establish national GSM roaming on Polkomtel network (Plus/Simplus/Sami Swoi). However, Vodafone as the only shareholder (19,61%) of Polkomtel disaproved the idea. Finally, the roaming agreement was signed but Voda announced to block it under the pretext "it's harmful to the company". In response, P4 complained to the regulatory office UKE. Theoretically, the office may even force Polkomtel to sign a new agreement, with T&C's worse than currently negotiated...