Vodafone has become the latest mobile operator to offer the iPhone, with the announcement of availability from 14 January.
Vodafone's lowest-cost tariff with a free handset is £35 per month. The two-year contract includes 600 minutes of free calls and unlimited texts and Wi-Fi services.
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O2 has had problems with its network recently, with some users unable to access the internet on their phone.
Software available on iPhone: