Hi,
I downloaded Telmap Navigator from there site last night and it works brilliantlly as a sat nav. The question i'm wondering is how much data usage am i using every time it's being used. I suppose it like asking how long's a piece of string but my limit on data usage per month is 1GB so it would be helpful to know just how much data i'm using on a daily basis by using the software.

Many thanks in advance.

GPS uses quite a bit of data to generate the map.

keep an eye on your data usage

As knotty says, maps use lots and lots of data.