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What is the difference between Dual Active and Dual Standby?

By Gogi Rana on June 17, 2012 47 Comments

When buying a dual SIM mobile phone there is one feature that creates a lot of confusion among the customers. It is important to know what Dual Active and Dual Standby really means. Because once you open the handset box pack, there is no turning back.

So you want to buy a dual SIM and the specifications say it supports dual Standby, do you really know what it is or are you just happy that you can use 2 SIM on a single phone. In most cases customers get disappointed because they never understood the feature.

Dual Standby phone

The market is filled with a lot of low cost or high end phones that supports dual Standby mode. Read the word carefully and you will understand what it really means. Dual + Standby, this means the phone supports dual SIM but in Standby mode. In simple words when none of the SIM are used then both the SIM’s are active but when you are using a particular SIM the other SIM becomes inactive.

Another issue with dual standby phones that support 3G is that, when the 3G / 2G network is used the other SIM becomes inactive. Usually you will not notice this issue with normal usage, but try downloading a big file or watch a streaming YouTube video, the other SIM will be unreachable.

In dual standby if a person is using SIM 1 and another person is calling on SIM 2 they will hear the message “not reachable, try again later”.

Many of the dual SIM users usually talk more on one particular SIM and the other SIM is basically for their personal use – not so important, they don’t really have any issues with this mode. If you want both the SIM’s active at all times then this is not the feature you should are looking for.

Dual Active phone

Again as the same suggest its Dual phone with active mode which means both the SIM’s are active all the time. Dual active is relatively easier to understand. Use SIM 1 or SIM 2 for voice calls or net surfing the other SIM is always active you can still receive calls on the other SIM and even switch calls for example, you can keep the caller on SIM 1 on hold and talk to the other user on SIM 2.

There are very few dual Active phones available in India, so if you need this functionality make sure you choose the right option.

The Dual Standby phones use a single transceiver which at a given time can server only one SIM, whereas most dual Active phones comes dual transceiver, one for each SIM.

Do check before you buy the dual active phone because even when the manufacture says that it is dual active it still works like a dual standby.

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Filed Under: Tech Tagged With: how-to Updated : June 17, 2012

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{ 47 Responses }

  1. ayy

    March 31, 2018 at 12:25 pm

    informative. thank

    Reply
  2. Mahendra

    August 23, 2017 at 11:55 am

    I want to buy LG Q6 wherever it is mentioned :

    Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
    – MIL-STD-810G compliant

    Q1. What does it mean by above statement ?
    Q2. Shall I be able to use Internet while running a call from same sim or different sim ?

    Reply
  3. jack

    August 23, 2017 at 11:23 am

    this is very helpful, thanks a lot

    Reply
  4. Stan

    May 20, 2017 at 7:38 pm

    Great explained! Thanks!

    Reply
  5. Rama Iyer

    March 1, 2017 at 11:17 am

    Great info. Thanks. Can you suggest some good Dual Active phone available in India and oblige.

    Reply
  6. Ranjit Vadakkan

    May 19, 2016 at 8:09 am

    Dear Mr. Gogi,

    I have been reading your reviews on various mobiles and have found out to be very simple to understand.

    Just needed to know whether Moto x play is a dual active sim phone or dual standby?

    Reply
    • rajeev

      October 14, 2017 at 7:35 pm

      I have motox play and it is dual standby phone, if sim one is active on call then other sim doesnt work.

      Reply
  7. Jiggs Kohli

    April 24, 2016 at 10:25 am

    I am travelling to Canada and plan to take a local SIM from there and want to use Indian SIM also in any dual SIM phone. Which phone should I buy as I want to use data and calling on Canadian number and remain connected on receiving calls from India on older number. Also I would like to redial the number received on Indian SIM from Canadian SIM as it would be cheaper. Please suggest which fone shall I buy…dual standby or dual active?

    Reply
  8. sagar

    March 9, 2014 at 6:05 am

    Hi…am using samsung galaxy grand 2…n using sim1 for data use n sim 2 for calling n sms…. i am facing a huge problem here…when ppl calling me on sim2 they r receiving msg like my phone is not reachable…. what should i do? Pls help…..

    Reply
    • Krishna

      May 28, 2014 at 8:03 pm

      Hey you can do call divert to the active sim… Simple!!!

      Reply
      • Sohaa

        February 2, 2017 at 8:37 pm

        Nice idea
        Thnx

        Reply
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