Is it possible that a 3G 2100Mhz repeater is also able to amplify LTE signals in the same frequency?

To all engineers out there, is it possible for repeaters rated for 2100mHz 3G is also able to amplify LTE signals under the same frequency? My iPhone cycles through LTE and 3G when the repeater is on, while it switches to "No Service" when the repeater is unplugged.

Yes, it's called a carrier frequency. Works along the same lines as frequency doublers used to.

It depends on the design. LTE and 3G are dramatically different protocols.

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