system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can my mobile phone still perform an emergency call even when there is no coverage available?
gpt
Because phone operators allow mobiles from other networks to make emergency calls on their network.
So while you may not have coverage, because you're a Vodafone customer, there still might be T Mobile coverage available, which you can use only for emergency calls.