I bought this phone as Testra had it as a Blue Tick phone (Good reception). Maybe with Teltra's network but not Optus. I live 23.7 km approx from the tower with direct line of site. Phone sometimes at 4 bars but then no network connection. Was to replace a Samsung S2 which has no problems. Optus have just returned it to me after I sent it back for checking. Don't buy this phone unless you live in a cilty with good coverage.