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Bt is bluetooth, and LTE is a watch that requires its own line of service. Meaning that you would have to pay for an additional phone service.
Sorry, there was a problem. Please try again later.Bt is simply Bluetooth, and the device connection is limited to the bt range, which is about 30 feet or more from the device or phone. On the other hand lte has its own cellular service (which is paid for to your carrier) so ther is no range limit and the device and work side by side with your phone or independently at a distance. So, the extra cost difference is for that feature.
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