“Can you please outline the key differences between the series 3 and the series 7. Also, does it work in the UK with the cellular services.”

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• I owned both. The 3 series battery doesn’t last as long and it doesn’t read your oxygen levels. The 3 series is a great watch too but if your a busy person like me, buy the 7 to keep a longer battery life

  Answered by Melinda 4 years ago

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• I couldn’t tell you since the 7 is the only one I’m familiar with. I do know that Apple is rendering it pretty much obsolete shortly and won’t be supporting any updates.

  Answered by Newwatch 3 years ago

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• This is my first Apple Watch

  Answered by Jonsproduct 3 years ago

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• You will get heart rate monitoring and the option to select sim also available. But it’s optional.

  Answered by DineshK 4 years ago

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