public void sendMsg(String phoneNum, String msg) {
		if(msg != null)
			if(phoneNum == "self")
				this.os.println(msg);
			else
	        	for (int i = 0; i < clientThreads.size(); i++) {
	        		if (clientThreads.get(i) != null && clientThreads.get(i).phoneNum == phoneNum) {
	        			clientThreads.get(i).os.println(msg);
	        			this.server.log("Msg: " + msg + " send to client " + clientThreads.get(i).phoneNum);
	        		}
	            }
	}