Fashionable smartphones and tablets, flexibe tariffs and prepaid mobile - O2 offers several options for every budget! Whether you opt for a contract mobile phones or rather for a smartphone with contract! Our award-winning online O2 friendly customer service is always available for explanations about the best phone options, with or without a cell phone contract. Whether it's a new iPhone mobile phone or a new Galaxy Samsung mobile phone. Click Here to know more about hotline o2.