Should also use built in voice comms, its server side, and when you talk your characters face appears on the side of everyones screen

for single player games with bots you can bark commands at them:
DEFEND: Defend the base.
ATTACK: Attack the enemy base.
COVER ME: The bot will protect you.
FREELANCE: The bot acts as a rover.
HOLD POSITION: The bot comes over and holds your current position.
STATUS: The bot provides its current status.
GIMME: The bot gives you their current weapon.
There are also some hidden voice commands that you will have to discover
amazin