Walkie

Can I use 2 android phones as walkie talkie? (without internet!)
How can I use my phone as a walkie talkie without Internet?Does walkie talkie require Internet?Does walkie talkie communication app work without WiFi?...
Can I use android phones and PC as walkie talkie? (without internet!)
How can I use my phone as a walkie talkie without Internet?Does walkie talkie work without WiFi?Can we use mobile as walkie talkie?How do I turn my ph...