Dual SIM card capability allows the user to use two phone numbers with one phone.
A dual SIM card compatible cell phone is a mobile phone that can work with two SIM cards. This can be handy in countries that make phone calls inside the mobile network cheaper than those outside it. For example, if a person is a prepaid customer of networks A and B, he can use the SIM card of network A to make phone calls to other customers of that network. However, if phone calls from network A to network B are expensive, he can switch to the network B SIM card to call other users of that network.
The Nokia C1-00, launched in June, 2010 and available mostly in developing countries, notably India, is a frugal dual SIM handset. It lacks a camera and is equipped with a rather small 128-by-160-pixel 1.8-inch display. It also comes with a flashlight and an FM radio player. The phone is available in Medium Blue, Red, Light Gray and Sea Green colors.
The Samsung B7722, also launched in June, 2010, is much more potent than the Nokia C1-00. It features a 3.2-inch TFT touch screen and a 5-megapixel camera with a 2560-by-1920-pixel resolution. Other features include a document viewer, an MP3, WAV, WMA and eAAC+ audio player and an MP4, H.263 and H.264 video player.
The LG GX200 was announced in February, 2010. The 2.0-inch display can show a resolution of up to 144 by 176 pixels. The 1.3-megabyte camera, producing a maximum resolution of just 1280 by 1024 pixels, is inferior to that of the Samsung B7722. In addition to the dual SIM card capability, the phone also comes with an audio and video player, which supports MP3, WAV, eAAC+, MP4 and H.264 multimedia formats.
The Motorola EX115, announced in September 2010, comes with a 3.15-megapixel camera with a 2048-by-1536-pixel resolution. The display measures 2.3 inches in diagonal. The QWERTY keyboard allows for easier typing of text messages and reminders. The phone’s media player supports MP3 and AAC+ audio formats and MP4 and H.263 video formats.