I bought Treo680 in UK. Worked well in UK and in Poland. When I moved to Australia, there is constant problem with connectivity, irrespective of network - Telstra or Optus.
The connectivity to network is lost several times a day, even at home when it is not moved ! This is to the point the phone is almost unusable
I had before another Treo680 bought in Germany and worked very well in Australia.
SA Number: 100....
Carrier DB: 561