参考以下内容去选你的手机
2G2G, other wise known as GSM, is standard on almost all phones (except CDMA phones in the USA). Most new phones come with quad band GSM support. A quad band GSM phone supports 850, 900, 1800, and 1900MHz. 2G is old technology and provides a fall back position when 3G coverage is unavailable. Australian 2G bands: - 900Mhz (Telstra, Optus & Vodafone)
- 1800Mhz (Telstra, Optus & Vodafone)
3GThere are several 3G networks operating in Australia. 3G frequencies are usually specified as UMTS/HSDPA or WCDMA frequencies on the mobile phone specifications. Australian 3G bands: - 850MHz (Telstra, Vodafone) – Exclusive 3G band
- 900MHz (Optus, Vodafone) – available in most metro areas on Optus, with both Optus and Vodafone re-farming the 2G 900 spectrum in regional and rural areas
- 2100MHz (Telstra, Optus, Vodafone) – Exclusive 3G band
4GAustralia is currently using these LTE bands (LTE bandmask in brackets): - 2100Mhz (B1) FDD (0000000000000001) – Telstra (3G spectrum)
- 1800Mhz (B3) FDD (0000000000000004) – Telstra, Optus, Vodafone
- 900Mhz (B8) FDD (0000000000000080) – Telstra, Vodafone?, Optus (utilises spectrum previously used by 2G)
- 2300Mhz (B40) TDD (0000008000000000) – Optus (Vivid wireless spectrum)
To follow late 2014: - 2600Mhz (B7) FDD (0000000000000040) – Telstra, Optus, TPG?
- 700Mhz (B28) FDD (0000000008000000) – Telstra, Optus
LTE (Long Term Evolution)/ 4G – more informationTelstra, Optus and Vodafone sell dual mode LTE/ HSPA+ mobile broadband devices that operate seamlessly across 2100Mhz, 1800MHz, 900Mhz and 850MHz spectrum bands, providing customers with 4G(LTE) data where it is available and then seamless switchover to the 3G HSPA technology in other areas. Voice is currently 3G only In April(2011) Vodafone announced it will replace 8000 2G and 3G base stations with equipment which can be switched to LTE "at the flick of a switch". In September 2012, Optus announced the activation of its 1800 MHz 4G LTE service in Sydney, Melbourne, Perth and Newcastle. 1800 4G was first trialled in Newcastle (mid 2012). Brisbane and the GoldCoast 4G was activated on 31st October 2012 and Adelaide, just in time for Christmas.
4G Band PlansNote: During 2013, Telstra Vodafone and Optus by arrangement, swapped 1800Mhz spectrum allocations to provide each with 2 x 20Mhz of contiguous spectrum. Telstra 1800MHz, 2100Mhz and 900MHz FDD-LTE (see below) The 1800 service is currently rolled out with 10, 15 and 20MHz carriers. Operating frequencies are as follows: Most areas in Australia including regional Victoria 4G have carriers with up to 15MHz bandwidth: - Tower Tx: 1805-1820MHz
- Tower Rx: 1710-1725MHz
New South Wales and Metro Melbourne & Geelong have carriers with up to 10MHz bandwidth: - Tower Tx: 1805-1815MHz
- Tower Rx: 1710-1720MHz
Telstra indicates it will roll-out out 900MHz LTE in mid 2013 to increase coverage depth. This will be a re-farm of 2G 900 spectrum. A 5Mhz bandwidth LTE carrier is the most likely solution. Ref. It will deploy 900/1800 carrier aggregation. Optus 1800 (FDD-LTE) + 2300 MHz (TDD-LTE) The 2300 MHz Band 40 Optus spectrum was obtained courtesy of the Vivid Wireless acquisition. It provides up to 98MHz bandwidth in Perth, Brisbane, Sydney, Melbourne, Canberra and Adelaide. Canberra may be one of the first 2300 4G locales with a 3 x 20Mhz channel roll-out, sometime in 2013. It is called 4G Plus by Optus. The Optus 1800MHz FDD-LTE service currently supports up to 20MHz of duplex bandwidth. 10Mhz carrier - Transmission Downlink: 1840MHz – 1850MHz
- Transmission Uplink: 1745MHz – 1755MHz
The Optus 2300 TDD-LTE service provides up to 98MHz of continuous spectrum: Optus have plans to convert the 2300MHz band into a TDD-LTE service. TDD differs from normal FDD-LTE services by using only one frequency band to serve as both an upload and download channel. This means that 98MHz of spectrum must be shared between both upload and download, and while this may offer some benefits in dynamically scaling back upload bandwidth to support higher downloads (or vice versa), this means that we shouldn't be quite as excited about the 98MHz of bandwidth as we might have initially been. Vodafone 4G The Vodafone 1800MHz FDD-LTE service currently supports up to 20MHz of duplex bandwidth. | 
微距拍花 (2009-9-5) sinkai 
发表于 2014-7-25 10:58
