What does duos mean in Samsung phones?

Dual SIM
The Samsung Galaxy (stylized as Samsung GALAXY) is a series of Android-powered mobile computing devices designed, manufactured and marketed by Samsung Electronics, including Dual SIM SmartPhones marketed as “Duos”.

Are all Samsungs dual SIM?

Depending on the country/region and carrier, Galaxy S20, S20+, S20 Ultra, Z Flip, Note10, Note10+, S10e, S10, S10+ and Galaxy Fold are either a dual SIM model or single SIM model. With the dual SIM Galaxy S20, S20+, S20 Ultra, Note10 LTE, and Note10+ LTE models, you can use two SIM cards at the same time.

Do you need 2 SIM cards for a dual SIM phone?

A Dual SIM Passive phone can use two different SIM cards, but only one of them can be active at any time. That means that when one SIM card works, the other is unreachable. To use the second SIM card, you need to activate it manually, and the first SIM deactivates when you do that.

Does Samsung S21 have dual sim?

The S21, S21+ and S21 Ultra come with a new, more compact dual SIM card tray. This tray has space for one nano SIM card on the top, and another on the underside. Follow the steps below for more details on using two SIM cards with your S21.

Can you turn one SIM off on a dual SIM phone?

In a dual sim phone you cannot switch off one sim alone. When you switch off the phone both the Sims are affected. In mobile data, you can activate either of the sim for data purpose.

Why do I have SIM 1 and SIM 2?

One would choose to have one network for calls and the other for data mainly for financial reasons. The exact support for each SIM slot depends on the phone but in most cases: SIM1 supports all features of the network (2G/3G/4G/data) SIM2 can be used only to make or receive voice calls, in many cases 2G only.

How does dual SIM work on Samsung S21?

Select dual SIM settings on your Samsung Galaxy S21 5G Android 11.0. When you insert two SIMs into your phone, you can make calls and send and receive messages from both SIMs. You can also select a default SIM for mobile data usage. Slide two fingers downwards starting from the top of the screen.