system
Given the following post, respond as if you're commenting on Reddit:
human
If one goes through a portal to a parallel universe where there are no cellphones, and the portal remains open, do they still get reception?

I need to know.
gpt
It depends on the nature of your portal. If you have a "bridge" or "door" style portal that converges two points of space, enabling you to freely step through, then you would probably have some range in front of the portal but only when the signals could pass through at the right angle. Probably wouldn't extend very far unless you could put a transmitter at the portal, or had a very large portal.

Obviously if you're teleporting, you're gunna be out of range of a standard early 21st century cell phone.