I have a prepaid MTN simcard in my mobile router, which I use for my laptop, phone and tablet when I am on the road.

How can I check how much of my prepaid data bundle is left?

I don't want to have to take the simcard out of my mobile router and stick it into a phone to check - too much hassle. I can access my mobile router on my browser and there is an SMS utility there, so I am sure there must be a number that I can SMS with a message in it, and then get an SMS reply with the details?