Apple is warning service providers of a wave of fake iPods.

A news report on AppleInsider says that iPod nanos and shuffles are the most common counterfeits.

The fakes "often sport" non-standard headphone jacks and don't have a dock connector. Fake nanos ship without a standard USB cable, carry a slightly larger screen, use a different operating system and "have also been known" to carry a Play/Pause symbol on the central button.

Some of the fakes are stamped with a valid Apple serial number, many using the number: "6U545TK2TJT".

Both fakes ship in fake iPod boxes.

"Apple said it is taking the matter very seriously and any information provided by buyers of the counterfeit players may help the company in dealing with the matter," the report explains.