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I want to use 2 (or more) android phones as walkie-talkie (i.e. they talk each other without needing internet/voice call).

Of course this should work with WiFi, because it doesn't make much sense a to have Bluetooth or USB connection for this application.

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Wi-fi implies internet. What do you mean "without internet"? –  Nathan Fellman May 26 '11 at 11:39
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It does not. If I establish an ad-hoc connection between two android phones, I'm using wifi but not internet. –  michelemarcon May 26 '11 at 12:49
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Kind of tangental: wouldn't you then be close enough to just talk to each other? I guess you might be separated by a wall or something, but the range of an ad-hoc network probably isn't going to be too large... –  eldarerathis May 26 '11 at 13:06
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@michel: but if you're under the same wifi, then you're not using an ad-hoc connection between the two phones, but rather relying on a third party. Besides, as far as the phone is concerned, there's no difference between ad-hoc and other wifi. Either way you're using TCP/IP over wifi. The only difference is that your connectivity suffers. –  Nathan Fellman May 26 '11 at 13:43
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@Nathan: Yes, but again: wifi!=internet and wifi range may cover large areas, therefore my question is interesting. –  michelemarcon May 26 '11 at 13:56

7 Answers 7

The project mentioned by BobFlemming is the Serval project, and they are also on twitter. The android application will be available soon apparently.

Thought I'd mention because not entirely straightforward to find it through the youtube link and that the twitter account isn't advertised on the site. Also I cannot +1 or comment yet so adding it as a reply.

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The previously mentioned serval project now has an android app available - https://play.google.com/store/apps/details?id=org.servalproject

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And here's another app like that - Walkie-Talki by Wi-Fi and BlueTooth - play.google.com/store/apps/details?id=com.androidintercom –  Varrah May 21 '12 at 12:24
    
i wonder if someone has the tutorial how to make the simple mash-wifi app just like they created that app..... @Varrah –  gumuruh Jul 18 at 3:09

here is a project on sourceforge , please refer whether it help your need or not.. just link here,

http://android-ptt.sourceforge.net/

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Seems to have died before it really took off. –  Jan Hudec Apr 24 '13 at 6:53

There are many push to talk apps on the Marketplace, but they all required an Internet connection. As far as I know, Android doesn't support ad-hoc WiFi connections.

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Android doesn't support ad-hoc WiFi connections without rooting (the only thing that prevents it is explicit check in the system library, so rooted phones and custom ROMs like CyanogenMod support it), but you can build an ad-hoc network from managed connections too and Android supports becoming AP. –  Jan Hudec Apr 24 '13 at 6:51

you can use bluefi phone. with that soft you can talk using bluetooth and wifi.

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Thanks for answering – but without at least a link this isn't really a helpful answer. Maybe you could edit it to add some more details (including the link)? Thanks! –  Izzy 14 hours ago

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