Dual SIM smartphone is not just a phone that supports two SIM. Actually, there are two main types of dual-SIM devices. Take a look at this article below for more information!

Standby Dual SIM Phone

The first type is Standby Dual SIM phone. This kind of phone supports two SIMs at the same time. But normally these SIMs are in standby mode. Users don’t have to manually switch these SIMs on or off because it’s automatic. Whenever one SIM is in use, like calling or 3G, the other SIM is temporarily turned off. Technically speaking, in dual-SIM smartphones, only one processor is in charge of managing both SIMs. That’s why it’s impossible to have two SIMs working at the same time.

However, Standby Duo-SIM phones are becoming more and more popular because they lead to many advantages. Traditional dual-SIM phones are not able to alert users which network receives the phone call. But Standby one can be on call to receive both. So this kind of phone is an idealistic choice for those who want to separate their work and their personal life.

Active dual SIM phone

Contrast to Standby duo SIM phones, Active dual-SIM phones have two SIMs working at the same time. They are always available for calls even when one of them is currently in use. Because there are two processors in charge of the SIMs. Compared to the Standby one, Active duo SIM handsets even come with more benefits.

For example, if you are calling with one SIM and receive another call on the other SIM, instead of the caller receiving the “not available” message like in Standby phones, the caller will be kept waiting and informed that the person they are calling knows about the call. With this technology, this kind of phone is a better choice for business users who don’t want to upset their partners or clients.