Ono, purchased by Vodafone for 7.2 billion euros (5.9 billion pounds) including debt, has around 3.4 billion euros of bank loans and bonds.

"We will renegotiate the debt to obtain conditions that are more compatible with our financial situation," Antonio Coimbra, chief executive of Vodafone Spain, told El Pais newspaper on Sunday.

He did not detail what structure or terms Ono and Vodafone would seek.

Coimbra said Vodafone hoped to get European Commission approval for its Ono acquisition in three to four months.

He added that the company would seek to end, as soon as possible, a contract Ono has with Spain's Telefonica until the end of 2015, which allows it to use Telefonica's mobile phone network.

Vodafone's acquisition of Ono has shaken up Spain's highly competitive telecoms market, and could prompt more consolidation as players such as France's Orange (>> ORANGE SA) seek out deals to avoid falling behind.

(Reporting by Sarah White; Editing by Anthony Barker)

Stocks treated in this article : ORANGE SA, Vodafone Group plc