No, they aren't allowed to.
No. During a water polo match, touching the bottom of the pool is considered a foul, and will be called as such. The term used is: "Off the bottom." This will cause the team to lose the ball and cause a turn-over.
They usually make the pool too deep for the players to touch, and if they are able to touch it; it is deep enough for the refs to notice
None it is a major foul if a player touches the wall at any given time during live play
No, the pool is over 2m deep at least, but deeper in higher levels. If you do you will probably get called up for duck diving.
The volleyball may touch the net while crossing over it. A volleyball driven into the net may be played within the limits of the 3 team hits, so long as it indeed remains in play (typically: stays in-bounds and off the ground). If the ball rips the net or tears it down the rally must be replayed.
No. If you do, the ball is given to the other team.
yes, you are allowed. However, do to radio communications that the pilot needs, phones interfere with radio signals. They may ask you to turn them off for a short period of time, (Ipods, Mp3 Players, Phones, Portable DvD players, etc.) but you are allowed to have them on there.
The goal keeper (may be known as a goalie or keeper) is allowed to touch the ball with his hands and to pick up the ball as long as he is within the 18 yard box (also known as the penalty area). Other players may only handle the ball when it is out of play. This is usually either when the ball goes outside the bounds of the field, such as for a throw-in, goal kick or corner or when the referee has blown his whistle to indicate a foul or to indicate the end of a half. Note that during a goal kick, corner or free kick / penalty the player may initially position the ball with his hands, however once the referee blows his whistle to recommence play, the ball must only be played with the feet.
No. They can not touch the bottom of the pool. They are swimming or treading water the whole game. I heard the water polo team talk about this last week.