Power off when swapping internal to external antenna

Can the internal antenna be removed and swapped to an external antenna, while the power is on?

What if the cellular is disabled, can an antenna be swap happen when disabled and power is on?

another way to ask this…
Are the antenna’s, Hot Swapable?

I unscrew and swap antennas on Peplink cellular routers all the time with no issues.

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While the power is on?

Yup, power on and in use by systems for data. Unplug the antenna, watch the signal drop plug in a new one and off we go again…