Do these devices only refer to timekeeping, or do they also include features like step counting, heart rate monitoring, and displaying alerts on the screen? Typically, they connect wirelessly to smartphones, but are there other connection methods? For example, do those that can make calls using an independent SIM card also fall into this category?
What do smartwatches actually do?
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Just like smartphones, advanced smartwatches can operate completely independently with Wi-Fi and GPS connectivity. Models with SIM cards can even answer incoming calls—devices that eliminate the "I forgot my phone" problem without ever having to take your phone out of your pocket.