DeezeNuts has reported on IRC that he was able to enter a state where PTT would continue to transmit voice even though the app was in the background and the phone was locked.
I've found a few cases where you can force the app to continue transmitting after locking/exiting it.
Hold PTT
Click the lock button (top of the phone)
=> You continue to transmit even though the phone is locked.
Hold PTT
Press the home button to background the app
=> You continue to transmit even though you aren't resting your finger on the PTT trigger.
DeezeNuts has reported on IRC that he was able to enter a state where PTT would continue to transmit voice even though the app was in the background and the phone was locked.
I've found a few cases where you can force the app to continue transmitting after locking/exiting it.
Hold PTT Click the lock button (top of the phone) => You continue to transmit even though the phone is locked.
Hold PTT Press the home button to background the app => You continue to transmit even though you aren't resting your finger on the PTT trigger.