Can I make my laptop to be a walkie talkie?
Can I make my phone to be a walkie talkie?
Yes, you can do that! Without paying anything.
Go to https://web.voiceoverping.net if you don't believe.
Or download on your android phone: https://play.google.com/store/apps/details?id=com.media2359.voiceping.store
Or download on your iOS phone: https://itunes.apple.com/us/app/voiceping/id1249953303?ls=1&mt=8Type 4 digits channel ID you want to join. Click Join Channel.
On the other devices do the same. Now tada talk as long as you want!