Ideally I want an instant notification (just like receiving SMS or WhatsApp message) letting me know that a new deal has been created and/or a new activity has been created (so that I can call them ASAP).

I've had a look at the notifications settings and turned on everything I could, but I think the best I could find was notifications for Activity Reminders? ... does at the time of the event work for an all-day task?

Is there a better way for me to get instant notifications for new deals/actions created?