Telstra mobile still offers the best service coverage for our area, we are in a fairly major town / city area but our house is low set and seems to be right on the edge for good reception. Both Nokia and the iphone work well in our house, the old LG phone had big trouble and needed to be taken outside to work on most days. Having said that visitors using the other carriers had no service more often than not. For this reason alone I am happy to remain locked into my Telstra plan until I get convinced otherwise.