Speculation has focused on a handful of expected new features, including a slightly larger screen, a smaller dock connector and NFC technology that would make it easier for shoppers to make payments through their phones.

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As Apple showed during its iPhone 5 launch, when the company announced a major change to its dock connector, Apple prefers to move technology forward rather than maintain compatibility, and corporate customers are deeply concerned with compatibility.

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There has also been market speculation that it will supply audio technology for Apple's iPad connector.

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Built-in cloud technology with choice of EMC Atmos cloud connector, EMC Avamar data deduplication (StorCenter px2-300d models only), Mozy Pro, Amazon S3 and Iomega Personal Cloud technology.

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Security features include TPM1.2 data security technology, BIOS built-in security, and a Kensington lock connector.

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