I use digi prepaid plan, my internet plans range from weekly RM4 for 300mb, weekly rm9 for 1.5gb and monthly rm28 for 5 gb. Anyhow digi internet plans has worked for me just fine for both uber and grabcar.

I use maxis one plan 98. Unlimited calls and SMS. So can call and SMS passenger without worry. Sometimes I call them and told don't hang up until we find each other. Efficient for me. Coz not all passengers are educated (some can hardly speak English, etc. And as driver, not all area we familiar with. So constant communication is key to save their time and our time.