# Farthest voice communication without infrastructure?

**URL:** <https://boards.straightdope.com/t/farthest-voice-communication-without-infrastructure/646963>\
**Category:** Factual Questions\
**Created:** [January 12, 2013, 2:18pm UTC](https://boards.straightdope.com/t/farthest-voice-communication-without-infrastructure/646963 "2013-01-12T14:18:41Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![HairyCactus](https://avatars.discourse-cdn.com/v4/letter/h/2bfe46/32.png) [@HairyCactus](https://boards.straightdope.com/u/HairyCactus)\
**Post date:** [January 14, 2013, 7:31pm UTC](https://boards.straightdope.com/t/farthest-voice-communication-without-infrastructure/646963/21 "2013-01-14T19:31:21Z")

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Modern smartphones/cellular devices require a network to operate, (even for basic functions like make/recieve calls) so they would be out from the start. Ever seen the phrase ‘no signal’?

I would say no chance. The technology is too incompatible.

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**Author:** ![Amateur\_Barbarian](https://avatars.discourse-cdn.com/v4/letter/a/59ef9b/32.png) [@Amateur\_Barbarian](https://boards.straightdope.com/u/Amateur_Barbarian)\
**Post date:** [January 14, 2013, 7:41pm UTC](https://boards.straightdope.com/t/farthest-voice-communication-without-infrastructure/646963/22 "2013-01-14T19:41:08Z")

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Across London? Good FRS radios would have worked, most likely.

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