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Notification services like Google Messaging Service will allow you to send notifications, which are handled at the device level meaning you cannot send notification to a device and expect your app there to read it and process the content. If the purpose it just to let user know about something then you should use Google Messaging Service. Although the ...


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ADT emulator might help you a lot, with GSM carrier simulation. It also support two phone simulation for calls, etc. which is enough for many test cases.


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Similar to paj28's answer, but if both mobile devices can use WiFi, then there's an easy solution. Have both devices connect to your server over WiFi(they seem to be capable of doing this anyways, so I'm assuming this won't be a problem) Have the server record their connection information(Name, IP address) Pass all connection information to all connected ...


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Perhaps you might want to take a look at DHT: https://en.wikipedia.org/wiki/Distributed_hash_table It's what peer-to-peer software like BitTorrent, Freenet, RetroShare, or Tox build upon.


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Can you connect both the mobile devices to the same WiFi network? Mobile apps can open ports and make network connections, and you can use this functionality to have apps talk directly to each other. There are a number of practical difficulties, including how to find the IP address of the other device, and how to authenticate connections. I expect your app ...


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I'm not sure this is a realistic answer because it's a bit heavyweight. If you can't trust the networks your users are connected to, you could always have them fallback to a network you can rely on. So, for example, if your users are in a country that restricts access to your corporate server, have your mobile client fallback to using Tor. You can ...



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