Dual SIM and multi SIM phones are relatively new types of cell phones. These phones usually have several slots for inserting two different SIM cards. This permits the user to avail mobile connectivity services from several company. It's possible to even insert SIMs of several different in the slots that are available in the phone. This permits the consumer to hold one phone, rather than juggling between two handsets.

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If you are someone who travels a great deal, or have a mobile phone account which restricts cheap calls only to a small designated area, you can cut down on your roaming charges by purchasing another SIM aside from the one which you mostly use. Moreover, the ability to have several active numbers of various frequencies simultaneously implies that you'll be always inside the range of coverage, no matter where you go.

Before you buy a double SIM or multi SIM phone, there are certain things that you must bear in mind. Akin to all high-tech electronic gadgets, we've got the technology involved with these kinds of cell phones, is constantly undergoing upgrading. Early dual SIM phones where mostly gimmicky and also the double Sim holders allowed usage of the SIMs only one at any given time. Adapters were essential to cut the SIM cards so that they fit into the credit card slot. This often led individuals to ruin their SIM cards.

The most recent dual SIM or multi SIM handsets don't have these problems. Today, you can purchase a truly handy cell phone that has multiple SIM card slots. You can switch between your two cards by pressing a simple button which is conveniently located on the body of the phone. These new models enable you to keep all your cards active at a point of time or turn off a couple of as per your convenience. When you shop for the multi SIM or double SIM phone, look for the terms DSDS i.e. dual SIM dual standby or MSMS i.e. multi SIM multi standby.

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All multi SIM and double SIM mobile phones are multi-band. This means that these to support several frequencies, typically with each SIM card working on a different range. For example, a quad-band cell phone supports networks that can work on all GSM frequencies which are used around the globe i.e. 1900/1800/900/850 MHz. thus, such a mobile phone is ideal for international travelers.

Tri-band and dual-band phones are also available as regards dual SIM phones. Should you stay in Canada or even the US, makes certain that the handset you want to purchase supports your network's frequency i.e. 1900 or 850 MHz. Several tri-SIM mobile phones have one CDMA slot and 2 GSM slots for the ultimate functionality and flexibility.

Chinese manufacturers were the first to introduce dual SIM and multi SIM phones towards the market. The telephone attained immense popularity and soon the more acclaimed mobile phone manufacturers presented their very own handsets to profit from the improving demand for services for double SIM and multi SIM phones.