Will my Australian phone work in the USA?
Most the world uses GSM 900 or GSM 1800 networks including Australia that means most phones that you can buy in Australia will work in most countries. The USA has different networks and so while most phones will work in the USA, they may not work on every different network.
In the United States there are only two 3G/GSM mobile carriers (AT&T and T-mobile) whereas the other carriers such as Verizon and Sprint use CDMA networks. Australian mobiles will not work on CDMA networks so these carriers won't work in less you buy a local phone.
So fortunately for us, our Sim cards will work in your existing Australian phone on the USA networks. If you're planning on travelling to the United States and will buy a phone while there, or if you plan on using one of their local carriers must be careful to make sure that you buy the right thing. If you're not careful, you could end up buying a phone that won't work anywhere else in the world except the USA.
For you to use your own Australian phone overseas in the USA, you need to check that your phone is unlocked so that it is able to work with other carriers Sim cards. This is easy to do by contacting your phone provider and checking with them first (before you travel is the easiest way).
To be specific, your phone needs to support GSM 900, GSM 1800, GSM 1900 or GSM 850. Quite often phones are tri-band or quad-band mean that they can tune into three or four different frequencies. The way to think this is to think of them as languages, your phone needs to talk to the network in a language that the network understands so that they can communicate properly.
If you're not sure if your phone is going to be able to be used feel free to get in touch with us, we would be happy to let you know.