An inquiry has been launched by the European Union into whether blocks on VoIP service by Europe's mobile phone operators are in breach of competition laws.
The EU's antitrust authority has written to every mobile phone operators how they deal with internet based voice calls.

VoIP provider, Vyke, has warned that mobile operators are poorly positioned to cope with latest industry developments.
Aaron Powers, head of business development at Vyke, said the operators are failing to spearhead new innovations – leaving them open to greater than ever competition from a new breed of rivals.