DualSim mobile phones are designed for the Australian market that allows you to insert to SIM cards and have both have both active simultaneously to allow calls to be made or received from either number.
The unique technology of have Dual Transceivers is unique to DualSim mobile phones. The normal GSM phones only have one Transceiver and can't be converted to Dual Sim operation. Some adapters that claim Dual Sim require you to turn the phone off and on again to switch between SIM cards.
Gone are the days of carrying and monitoring two mobile phones with you. DualSim mobile phones integrates the phone numbers from each SIM card into the phone book to ensure you can access all your numbers from one place and call any of the numbers on either SIM card.
The Dual Sim mobile phone is not reliant to any telecommunication service provider. This means that you can utilise the various offers from different service providers without having to change SIM cards. Eg; One service provider offering text messages and another provider offering free calls.