How to get push to talk (PTT) working on Android?

Software

• Zello is the software that's most commonly used for serious PTT. [2] [3] It has a freemium price model. [Google Play Store]   [Apple App Store]

Hardware

You don't need any special hardware for Zello, since you can use the on-screen button or the normal hardware button on your phone.

However, there is a lot of specialized hardware designed to integrate with Zello:

• (list at Zello)
• (search at Amazon)
  • all wired products
  • Pryme Pico products