So aliens show up on earth in the mid 1800s (or modernish humans but with FTL show up at an alien world w/ equivalent tech level). They want to share some of their advanced technology with us (not healthcare, they're biologically too different. The cure for their common cold would probably kill us and vice versa) and one of the things they want to offer us is remote communication.
Assuming the technology for display screens isn't super far advanced from what we can now do (so no holograms or "magical" technology) what would the best way for them to help proliferate displays and cameras and an information transfer network.
For TV/Displays I'd imagine there'd be no need to go through a CRT phase, unless there was some significant advantage to creating them that was a significantly lower hurdle for a low-tech society to cover.
Similarly would wireless cell networks be easy enough to "teach" to go straight to out of the gate, or would there need to be wired infrastructure first? There might be a fledgling signal network (see telegraph in actual history)