i am with optus and i have found it reasonable i usually get coverage out on the water from memory i had reception out at grange tyre reef (8ks ish) and clarries (15ks ish) norma (6ks ish)and there plans are alot better than telstra. i just refuse to pay there rediculous prices and there service is horrible, know too many people (parents, partner) with big problems with bills and to get anywhere you have to threaten them with the ombudsman otherwise they just try and scam you.and vod has some coverage but struggles alot!