iPhone shortages frustrate networks on launch day

Short supply of the latest Apple iPhone has left mobile networks "frustrated" and "concerned", the BBC has learned.

Several networks said that stock of the latest premium model - the 5S - was severely limited in the UK, and would likely cause disappointment.

None of the networks contacted wanted to be identified over worries they could be further disadvantaged when supplies were replenished.

Apple told the BBC it did not comment on stock levels.

However, networks contacted by the BBC pointed out that supplies of the new 5C, a lower-cost phone and newcomer to Apple's range, were plentiful.

Insiders from two of the companies told the BBC they suspected Apple was trying to drive sales of the cheaper 5C model, but that their own figures suggested customers had been hesitant to place orders.

Apple has prevented networks and retailers from allowing customers to pre-order the 5S.

One network spokesman said they had "crates and crates" of the 5C, but that the higher-end 5S was being "drip fed" into the market, and networks and retailers had been left "in the dark" about Apple's schedule for replenishing the stock.

He added that he was concerned that customers would be angry at the networks for the delay, rather than at Apple.

Less than one hour after going on sale in the UK, the 5S was listed on Apple's website as being unavailable for 7-10 business days for the UK.