Technology giant Apple is working on plans to facilitate integration of Cisco's Spark business collaboration service with iPhones in an effort to offer enterprise customers a better calling experience over Internet. Apple chief Tim Cook has said the company is making iOS devices to work better on Cisco technologies than any other mobile platform. "With iOS 10, we are making it easier to make and receive voice and video calls over IP (Internet Protocol). Now, Cisco Spark will integrate with iPhone for first-class calling experience. It's a seamless integration," Cook said in a video message at the Cisco Live Conference here. Last year, Cisco had forged a strategic partnership with Apple, under which it optimised its network for iOS devices and apps, integrating iPhones with its solutions and providing collaboration capabilities on iPhones and iPads. "Together with Cisco, we believe that we can take the work experience to the next level by ensuring that iPhones and iPads work together with Cisco technologies," Cook said. Apple has been working closely with Cisco teams to help create a seamless experience of Cisco software and network on iOS gadgets. The iOS integration with Spark will give users access to contacts, 'recents', and favourites. Users will also be able to answer calls directly from the lock screen.