Supply chain issues are reported to be delaying the rollout of Samsung’s flagship Galaxy S4 smartphone in the US, with Sprint and T-Mobile USA impacted – although all is apparently good for bigger operator AT&T.

According to Reuters, the South Korean company said that “overwhelming global demand” was impacting supply, but that it will be able to meet demand “in the coming weeks”.

T-Mobile USA has pushed-back availability by one week, citing “an unexpected delay with inventory deliveries”, with Sprint apparently undertaking a limited retail rollout, until more supplies of the Android-powered smartphones are available.

In contrast, AT&T’s website said it is “on track” to launch the device in retail stores this weekend, with pre-ordered devices set to be delivered to customers imminently.

Verizon Wireless is taking pre-orders for the smartphone, but said it will be available for purchase online and in stores “starting 30 May”.

So far, it has not been confirmed if supplies will be limited in markets other than the US.