With the announcement of both Orange and Vodafone securing rights to offer the iPhone in the U.K. in the coming months, a number of O2 customers may be looking to take advantage of a two-week window in which they can return their devices and wait for possible better tariff rates and contract terms on competing carriers. The Telegraph reports that as many as 30,000 O2 iPhone customers may be eligible for returns, and the company says it is not planning…
