Apple has been recalling some of its iPad 2 tablets which were designed to connect to Verizon's network due to connectivity problems.

Numerous posts were made on Apple's support forum by owners of iPad 2s complaining that they can't connect to Verizon Wireless's CDMA 3G network.

The cause of the problem is that many of the iPads were shipped with duplicate MEIDs (A Mobile Equipment Identifier), which is a unique number that is used to identify a mobile device when it connects to the network. Two devices cannot have the same MEIDcode.

Duplicate MEID numbers were flashed onto an extremely small number of iPad 2 units for the Verizon 3G network, an Apple spokeswoman told Reuters.

9to5 Mac had reported that Apple has offered to give affected customers a $50 credit. I was offered a $50 credit or iPad accessory and told that my iPad would be rerouted back to me, it quoted a customer as saying.

Apple said last week that the number of iPads sold reached the 25 million unit milestone in just 14 months. The figure also means that about 8 million iPads were shipped in the June quarter, exceeding analysts' expectations of 7 million units sold.