Dual SIM Card Phones definition
How to combine personal and business life, phone numbers, tasks? How to make significant savings on your mobile phone’s bill? The right answer is – Dual SIM card phones.
Dual SIM phones were once consider as cheep devices intended only for those who really don’t have the possibility to carry two phones.
Time has passed and these phones made its progress. Some of now-days Dual SIM devices even works on Android platform.
First there were Dual SIM holders. This solution allows only one SIM at a time to be active, while using other requests from user to turn the device off and on. Beside this, the main flaw is that it doesn’t fit in all devices.
As next solution shows up Dual SIM adapter. It fits in all devices but it has other flaws. Use of this device requires extracting original SIM chip and cutting SIM cards which always comes with a risk of damaging some of the components.
Finaly, Dual SIM Card Phone came up.
First of these phones made it possible to put two original-size-cards in handset and change them while the phone is still turned on.
After a while shows up a cellphone that can work with two cards simultaneously. In the begging they looked really odd, since those were phones with two displays and two keyboards that shared one battery. Latter came what we today consider as Dual SIM Card Phones.
Dual SIM Card Phone
Today’s dual SIM devices have slots for two cards and once you put them in it’s a done deal. Both cards are working separately and they can be connected to different networks simultaneously. That is really the whole point of it – using the best of each network.
When it comes to Internet situation is slightly different. Since it regards one device, one card can work on 3G Network while other can use only 2G. With Android dual SIM phones one can easily define in phone settings which SIM card should use which technology (2G or 3G). There isn’t an option to choose that both card use 2G technology, but it doesn’t mean that you can’t use 2G on both cards (for instance if Network Operator does not support 3G technology).
Both cards have it’s own indicator of signal strength.
When making calls or sending SMS user can choose between SIM 1 and SIM 2.
Dual SIM standby
With Dual SIM standby phones, cards in it are on standby mode each waiting for calls. When you get call on one of two cards, the other one automatically becomes unusable. Inconvenient here is that both phones can’t work in the same time. If you talk on one card and get call on other, the second call will be redirected on voice mail or you will be unavailable. If you while talking, get SMS on other card, it will be saved in SMS service center and after short period it will be delivered to you.
There are Dual SIM models that have main card slot inside, mainly under the battery, while other one is inserted from outside just like memory cards.
Dual SIM active
These phones are capable of using both numbers at any time. Therefor they are better and more expansive then Dual SIM standby phones. Only understandable disadvantage is that two active networks drain the battery.
You can use our Advanced Search to find the right phone for you with strictly defined characteristics (e.g. dual SIM).
Do you have need for two SIM cards?