It is unsure how many Virgin Mobile customers will be happy to pay that sort of money, as most of their current customers are more cost conscious. However, the much cheaper monthly fee may attract some.

Virgin customers will be able to sign up for the provider's usual $35 per month tariff, which would get them 300 minutes per month, as well as unlimited text messages, and unlimited 3G access on Sprint's network. If customers want to save an additional $5 on that they will be able to sign up for autopay to get a monthly fee of just $30.

Sprint has confirmed that the iPhone 4S would be available on Virgin from June 29.