Dual SIM
Encyclopedia
A dual SIM mobile phone is one which holds two SIM cards
. Initially, dual-SIM adapters were made available to use in regular mobile phones to allow them to contain two SIMs, and to switch from one to the other as required. This combination is called a standby dual-SIM phone. The first Dual SIM mobile phone was Benefon Twin manufactured by Benefon
in Finland
. It was launched on the market in 2000.
More recently, some phones have been produced that can natively work with two SIMs, both of which may be active at the same time. These are active dual-SIM phones. There are also some Chinese triple-SIM phones. Akai Trio is the first phone with triple GSM SIM slots
Dual-SIM operation allows the use of two services without the need to carry two phones at the same time. For example, the same handset can be used for business and private use with separate numbers and bills; or for travel, with an additional SIM for the country visited. Using multiple SIM cards allows the user to take advantage of different pricing plans for calls and text messages to certain destinations as well as mobile data usage.
These phones have until recent years been largely eschewed by the larger phone manufacturers partly due to their close ties with mobile phone networks who would prefer that customers use only one network exclusively. However more recently manufacturers such as Nokia
and Samsung
have started producing these phones, which will target customers mostly from developing countries.
s built in one of which may support 2G and 3G while another may only support 2G.
Though a new generation of Dual SIM Phones, called "Dual SIM Dual Standby" (DSDS) provide the ability to have 2 active SIM simultaneously, using only one transceiver. This is for example technology used in Freeyourmobile M180 Dual SIM Mobile Phone, K-Touch A982, LG-GX200, Philips Xenium - X100, Samsung B7722, Samsung B5722 and Samsung E2152.
Battery life
(talk time and standby time) of active dual-SIM mobile phones is reduced, typically by about a third. For instance, Device manufacturer Samsung declares a standby time for its Champ Duos E2652 Dual SIM phone of 476 hours when used with one SIM card and of 322 hours when used with two SIM cards. To compensate the shorter battery life, some Dual SIM phones ship with better capacity batteries, or in the case of Chinese-made phones, bundle their units with two batteries.
In November 2007, Verzio — a Singapore-based 3C (computing, communications, consumer electronics) brand launched the world's first 3G Dual-Triband dual-SIM model named Duplii. The same brand also launched the Twinn, 2.75G dual-SIM model. Powered by 2 processors, the Duplii and Twinn provide real dual-SIM real dual-connecting capability.
There are some little-known Chinese companies supplying inexpensive dual-SIM mobiles, mainly in Asia
n countries. The latest models includes W006 WiFi Dual Sim Mobile Phone, The M60 - Quadband Dual SIM Touchscreen mobile phone was launched in April 2010 being the 1st of the Chinese touch screen only mobiles with no keypad, including many features WiFi, Dual IMEI, Media playback & camera etc. to rival normal mobile phones.
Philips
has made models Xenium 9@9w and 699 with this capability belonging to the restart to change active-line generation. Samsung
also released the D880 DuoS in November 2007, a slider which can hold two SIM cards with simultaneous standby and the D780 which came much later both have limited function on the 2nd sim card, and there is a Windows Mobile based dual-sim phone too, called E-TEN glofiish DX900 (released in November 2008, been renamed to Acer Tempo DX900 in January 2009, after Acer bought E-TEN).
Popular Indian mobile companies such as Karbonn Mobiles
, Micromax Mobile, Spice
, Lemon Mobiles, LAVA Mobiles launch many feature phone
s with Dual SIM technology. Even few smart phones from these companies are Dual SIM based.
Nokia has now launched two dual SIM phone models C2-00 and X1-01. Both are 2G phones.
Also, Nokia will launch more dual SIM devices such as C2-03, C2-06 featuring a 'Touch and Type' user interface with 'Easy-Swap SIM' facility.
Subscriber Identity Module
A subscriber identity module or subscriber identification module is an integrated circuit that securely stores the International Mobile Subscriber Identity and the related key used to identify and authenticate subscriber on mobile telephony devices .A SIM is held on a removable SIM card, which...
. Initially, dual-SIM adapters were made available to use in regular mobile phones to allow them to contain two SIMs, and to switch from one to the other as required. This combination is called a standby dual-SIM phone. The first Dual SIM mobile phone was Benefon Twin manufactured by Benefon
Benefon
GeoSentric is a mobile telecommunications company founded in 1988 and headquartered in Salo, Finland. Benefon specialises in the manufacture of mobile phones with inbuilt GPS navigation.- History :...
in Finland
Finland
Finland , officially the Republic of Finland, is a Nordic country situated in the Fennoscandian region of Northern Europe. It is bordered by Sweden in the west, Norway in the north and Russia in the east, while Estonia lies to its south across the Gulf of Finland.Around 5.4 million people reside...
. It was launched on the market in 2000.
More recently, some phones have been produced that can natively work with two SIMs, both of which may be active at the same time. These are active dual-SIM phones. There are also some Chinese triple-SIM phones. Akai Trio is the first phone with triple GSM SIM slots
Dual-SIM operation allows the use of two services without the need to carry two phones at the same time. For example, the same handset can be used for business and private use with separate numbers and bills; or for travel, with an additional SIM for the country visited. Using multiple SIM cards allows the user to take advantage of different pricing plans for calls and text messages to certain destinations as well as mobile data usage.
These phones have until recent years been largely eschewed by the larger phone manufacturers partly due to their close ties with mobile phone networks who would prefer that customers use only one network exclusively. However more recently manufacturers such as Nokia
Nokia
Nokia Corporation is a Finnish multinational communications corporation that is headquartered in Keilaniemi, Espoo, a city neighbouring Finland's capital Helsinki...
and Samsung
Samsung
The Samsung Group is a South Korean multinational conglomerate corporation headquartered in Samsung Town, Seoul, South Korea...
have started producing these phones, which will target customers mostly from developing countries.
Types
- «Pseudo-Dual» - for convenience to use second SIM (as rule, it has «no major» slot for this) without both SIMs connected with owner's mobile service providers (MSP).
- «Dual Sim Shift»
- «Dual Sim Standby» (DSS) - allows the device to switch from one network to the other when required
- «Dual Sim Active» (DSA) - allows the device to be connected to both networks at the same time (it's using transceiverTransceiverA transceiver is a device comprising both a transmitter and a receiver which are combined and share common circuitry or a single housing. When no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s...
). - «Dual talk» - possibility to talk with 2 callers from different MSPs at same time (LG GX500)
Chinese Dual SIM Phones
There are many dual SIM phones now available from the Chinese market. The phones, which also usually include touch screen interfaces and other modern features, typically retail for a much lower price than branded models. Due to the extra battery usage of the additional sim slot the phones are usually supplied with two battery packs. Popular in Asia, these inexpensive dual SIM mobile phones are now also becoming available to buy directly from Europe, with reports that both slots are compatible with the majority of the major EU mobile networks.Active dual-SIM phones
Mobile phones with built-in simultaneous dual SIM capability allow both SIMs to be active simultaneously and allow calls to be received on either number at any given time. Most such phones have two transceiverTransceiver
A transceiver is a device comprising both a transmitter and a receiver which are combined and share common circuitry or a single housing. When no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s...
s built in one of which may support 2G and 3G while another may only support 2G.
Though a new generation of Dual SIM Phones, called "Dual SIM Dual Standby" (DSDS) provide the ability to have 2 active SIM simultaneously, using only one transceiver. This is for example technology used in Freeyourmobile M180 Dual SIM Mobile Phone, K-Touch A982, LG-GX200, Philips Xenium - X100, Samsung B7722, Samsung B5722 and Samsung E2152.
Battery life
Battery life
Battery life can refer to*How long a mobile device can work on a single charge of a rechargeable battery.*Battery lifetime degrading of battery quality over time....
(talk time and standby time) of active dual-SIM mobile phones is reduced, typically by about a third. For instance, Device manufacturer Samsung declares a standby time for its Champ Duos E2652 Dual SIM phone of 476 hours when used with one SIM card and of 322 hours when used with two SIM cards. To compensate the shorter battery life, some Dual SIM phones ship with better capacity batteries, or in the case of Chinese-made phones, bundle their units with two batteries.
In November 2007, Verzio — a Singapore-based 3C (computing, communications, consumer electronics) brand launched the world's first 3G Dual-Triband dual-SIM model named Duplii. The same brand also launched the Twinn, 2.75G dual-SIM model. Powered by 2 processors, the Duplii and Twinn provide real dual-SIM real dual-connecting capability.
There are some little-known Chinese companies supplying inexpensive dual-SIM mobiles, mainly in Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
n countries. The latest models includes W006 WiFi Dual Sim Mobile Phone, The M60 - Quadband Dual SIM Touchscreen mobile phone was launched in April 2010 being the 1st of the Chinese touch screen only mobiles with no keypad, including many features WiFi, Dual IMEI, Media playback & camera etc. to rival normal mobile phones.
Philips
Philips
Koninklijke Philips Electronics N.V. , more commonly known as Philips, is a multinational Dutch electronics company....
has made models Xenium 9@9w and 699 with this capability belonging to the restart to change active-line generation. Samsung
Samsung
The Samsung Group is a South Korean multinational conglomerate corporation headquartered in Samsung Town, Seoul, South Korea...
also released the D880 DuoS in November 2007, a slider which can hold two SIM cards with simultaneous standby and the D780 which came much later both have limited function on the 2nd sim card, and there is a Windows Mobile based dual-sim phone too, called E-TEN glofiish DX900 (released in November 2008, been renamed to Acer Tempo DX900 in January 2009, after Acer bought E-TEN).
Popular Indian mobile companies such as Karbonn Mobiles
Karbonn Mobiles
Karbonn Mobiles is a Telecommunication firm which was founded in March 2009. It is a joint venture Mobile manufacturing company between the Bangalore based United Telelinks Limited and Noida based Jaina Marketing & Associates. The company's total investment in Indian consumer market is over $5...
, Micromax Mobile, Spice
Spice
A spice is a dried seed, fruit, root, bark, or vegetative substance used in nutritionally insignificant quantities as a food additive for flavor, color, or as a preservative that kills harmful bacteria or prevents their growth. It may be used to flavour a dish or to hide other flavours...
, Lemon Mobiles, LAVA Mobiles launch many feature phone
Feature phone
A feature phone is a mobile phone that, like smartphones, combines the functions of a personal digital assistant and a mobile phone.Today's models typically also serve as portable media players and camera phones with touchscreen, GPS navigation, Wi-Fi and mobile broadband access.Feature phones is...
s with Dual SIM technology. Even few smart phones from these companies are Dual SIM based.
Nokia has now launched two dual SIM phone models C2-00 and X1-01. Both are 2G phones.
Also, Nokia will launch more dual SIM devices such as C2-03, C2-06 featuring a 'Touch and Type' user interface with 'Easy-Swap SIM' facility.
See also
- Subscriber Identity ModuleSubscriber Identity ModuleA subscriber identity module or subscriber identification module is an integrated circuit that securely stores the International Mobile Subscriber Identity and the related key used to identify and authenticate subscriber on mobile telephony devices .A SIM is held on a removable SIM card, which...
- International Mobile Equipment IdentityInternational Mobile Equipment IdentityThe International Mobile Equipment Identity or IMEI is a number, usually unique, to identify GSM, WCDMA, and iDEN mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone...
- ShanzhaiShanzhaiShanzhai refers to Chinese imitation and pirated brands and goods, particularly electronics. Literally "mountain village" or "mountain stronghold", the term refers to the mountain stockades of regional warlords or bandits, far away from official control...