First of all, congratulations if you purchased an iPhone! Secondly, you most likely noticed a column with the enigmatic label “Dual SIM.” Even though not everyone knows what this term means, it’s never too late to learn. We shall go into great detail about dual SIM in this post. Dual Sim – what is it and what is it for?
What is Dual SIM
Dual SIM functionality is available on a large number of phones—we don’t just mean iPhones here. It is her responsibility to insert two chips into the device and to utilize them simultaneously. If your smartphone has two functional SIM cards, they are identified as SIM 1 and SIM 2.
By name, it is very simple to tell them apart. You can always turn off one SIM card and keep the other one working. Using iMessage, messages can be sent from either SIM card to the iPhone. Facetime allows you to make phone calls as well.
Features of Dual SIM technology
Let’s look at all the possibilities of this wonderful technology:
- As mentioned above, you can use the services of two operators at once without reconnecting.
- Setting up one SIM card for calls and SMS, and the second for the Internet.
- Dividing contacts into different cards. For example, if one is intended for work, then you can transfer all work contacts to it.
- It is possible to use cards from different countries. For example, if you moved to Kazakhstan, then you do not need to get rid of the Russian chip. You can use both.
- If problems arise with one SIM, a spare one will always come to the rescue. This is very important when operators have problems and communication is lost. And you urgently need to make a call.
We looked at all the advantages and features of Dual SIM.
Disadvantages of Dual SIM
Even this technology has its drawbacks, and these are:
- Limited functionality.
- The battery drains faster. If you always use two SIM cards, then the operating time of the device will be reduced, especially if one of them is always in active mode.
- It does not work correctly in all regions, that is, Dual SIM works at certain frequencies, which makes it difficult for the phone to work in other regions/countries.
- You will have to delve more into the settings to organize the work of two SIM cards at once.
Dual SIM operating mode
There are 3 operating modes in total:
- active;
- passive;
- expectation.
Passive mode was used on older phones. The operating principle is as follows: two cards were inserted, and only one of them was active. To use the second one, you had to switch.
Active mode allows two SIMs to work simultaneously. If there is a call on one of them, then another call can be received from the other.
And the last one is standby mode, which is more common. If a call is received on one chip, the second one is automatically turned off. But at the same time, both SIM cards can function in parallel.
Dual SIM technology is relevant for many users. They actively use it because it is very convenient. There is no need to buy a new phone for each card, because you can go broke on this. You can also get advantageous services from operators.
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