Talk:Dual SIM

What does "Standby" mean?
The article mentions "standby" and redirects from "Dual Standby" but there is no explanation of what "standby" means. —Preceding unsigned comment added by 60.241.81.166 (talk) 01:49, 23 December 2008 (UTC)


 * I rewrote the article to make it more structured and easier to understand, but I am not an expert myself. I based the definition of "standby" on this post, but that's obviously not a reliable source. Moreover, the Spanish Wikipedia refers to "Dual SIM One Stand-by" (for non-simultaneous models) and "Dual SIM Stand-by" (for simultaneous models), which is almost contradictory to the definitions used here. But there doesn't seem to be much information on this yet. My bet is that these topics are yet to reach mainstream, and thus the definitions aren't standardized. We should thus be careful since we could help strengthen and even standardize a trend that might not be the best choice (as opposed to compiling the information after-the-fact, without interfering with it). I'll add an expert tag; let's hope that and the "unreferenced" template will call the atention of someone more knowledgreable in the subject. --Waldir talk 22:13, 21 November 2009 (UTC)

Standby is an word of chinglish (Chinese English).It come from the Chinese (待机), which refer to the duration when a mobile phone work with SIM card, or the state of you using a mobile phone in any time when there will be a call or messages. When there has a mobile phone which can use TWO SIM cards at one time, we say 双卡双待 in Chinese, translating to English that is dual Sim dual standby as chinglish. More detail 双 means dual, 卡 means sim card, 待 means standby. —Preceding unsigned comment added by Szdiglex (talk • contribs) 15:58, 27 January 2010 (UTC)

As a Chinese, I don't understand what 双待 means either. I don't know why 双卡 (dual SIM) cellphones are marketing as 双卡双待. Maybe it is just a slogan without any meaning. --Yejianfei (talk) 13:33, 6 March 2019 (UTC)

"Some Little Known Company"
Cound someone please locate the name of this company as quoted in the article or remove this piece of data. —Preceding unsigned comment added by 75.173.213.9 (talk) 10:09, 17 February 2009 (UTC)

What does "simultaneous" mean for dual sim phones?
In the current article, it mentions that dual sim phones allows two sim cards to be used simultaneously at any time. However, it seems that some actual built-in dual sim phones have the disadvantage of signaling one of the numbers as switched off if someone calls that number while the phone is receiving a call to the number associated to the other sim card. Also, in this reference, the term Dual Sim Dual Standby probably refers to active dual sim in the Wikipedia article, but no connection to the number of transceivers is made. — Preceding unsigned comment added by Hjpacheco (talk • contribs) 02:17, 18 January 2011 (UTC)

Apparently, this is somewhat connected to the Dual Standby capability of the cellphone, but from the current Wikipedia article and after browsing the web for a long time, I still couldn't be conclusive about this. At first glance, it would seem that having two transceivers does not influence this capability at all: "Internally, the active dual-SIM phones will have two transceivers, to allow simultaneous reception of signal from different connections.", as from here. According to this, this feature is only connected with the number of CPUs. I still wonder which is the relation between the number of CPUs and transceivers, and what Dual Standby really means in this context.

Can some expert please clarify on this? I believe it to be a common misunderstanding about this topic. Hjpacheco (talk) 02:08, 18 January 2011 (UTC)

Clean up grammar and work on readability
I made a few minor edits to the section describing the various types of dual SIM arrangements. I had to make the assumptions "owns" = "owner's". If the author of this section had a different intention then please explain that intent. The use of "owns" was not standard. Tzsm98 (talk) 22:18, 4 August 2011 (UTC)

external link for list of DualSIM phones
I added link (external) for list of Dual SIM phones under article, but someone marked it as spam.

So a question is: why not? I think it's good know which phones know it. Maybe someone who come, want to know it. — Preceding unsigned comment added by Amras Tasartir (talk • contribs) 17:02, 20 February 2012 (UTC)

What is W+G / G+G ?
The ZTE V889D apparently supports something called Dual-SIM W+G / G+G, as seen here http://www.etowalk.com/zte-v889d-3g-wcdma-40wvga-dual-sim-android-v23-msm7227a_p2875.html (see Network). What exactly does W+G / G+G stand for? Google is of no help at all. — Preceding unsigned comment added by Knutars (talk • contribs) 14:13, 21 May 2012 (UTC)

WCDMA + GSM / GSM + GSM UncleJester (talk) 19:17, 30 October 2012 (UTC)

DSFA abbreviation: dual sim full active
There should be a topic for this specific abbreviation as well. Who will write it? — Preceding unsigned comment added by Knutars (talk • contribs) 14:54, 21 May 2012 (UTC)

Con: All dual SIM dual standby phone cannot make or answer calls/datas on both networks at the same time.
This is not really a con. It is not possible to talk to two people at the same time. Are you comparing this to the situation of three people having two phones each and each person using two phones to make a three way conference call? 87.113.178.233 (talk) — Preceding undated comment added 12:42, 15 April 2014 (UTC)

The main deterrent to "standby" dual sim phones is that they cannot communicate on the second SIM while one is active.

So if one is on a call or constantly uses the data connection, the second sim will be out of service; this means that the second sim will: - will be unable to receive calls, without a missed call notification (some providers can work around this by using SMS or voice mail, but it usually costs) - SMSs destined for the second SIM will be delayed (if you are unavailable for a long time and receive many SMSs, delays of up to a few hours or more can be experienced) - be unable to provide data services (so if you talk one one sim and use the other for internet, you will be without internet for the duration of the call) — Preceding unsigned comment added by Switch.xp (talk • contribs) 09:38, 15 July 2014 (UTC)

Rewrite
Just did a partial re-write/pruning of the article as it looked pretty much like a mess to me, not to mention being largely unsourced. I'd be glad if anyone here's up to expounding on the article, most especially with its history and the various types of multi-SIM handsets. Blake Gripling (talk) 05:18, 27 April 2014 (UTC)

I've modified the examples. As an owner of both a Samsung Galaxy S Duos and an HTC 600, I can say for certain that one is a standby and one is an active dual sim phone. — Preceding unsigned comment added by Switch.xp (talk • contribs) 07:07, 17 July 2014 (UTC)

Usage of dual sim card phones
I added a section on why people might buy these phones.....which is the only reason I looked this article up. Having found nothing here, I spent 2 hours reading articles on who is buying these things and I thought I might share what I learned. N0w8st8s (talk) 09:07, 25 July 2014 (UTC)n0w8st8s


 * Very nice work. That's exactly what I was looking for. I copied one sentence from "reception/usage" to the introduction, which was too short. Now it also briefly says why dual-SIM exists.--Montalte (talk) 18:54, 2 February 2017 (UTC)

Grammar
Shouldn't it be "dual-SIM" instead of "dual SIM" (inside the article, not the title itself)? --Mortense (talk) 18:18, 13 September 2015 (UTC)

Removed excessive/unbalanced focus on recently-launched apple products
The article included 3-4 enthusiastic mentions of new Apple phones with this feature. The particular phones aren't really that important, they are not revolutionary or deeply transformative to the technology, so one mention listing them as examples of dual-standby type is completely sufficient.

The article doesn't deal much with important historical milestones and firsts in development of the technology, which would be more proper topic to elaborate on. For that reason as well, three long sentences or paragraphs lauding and promoting a single-vendor's implementation (that is arguably more late to the party than being advanced) have no place in an encyclopedic text.

194.228.207.2 (talk) 03:19, 9 November 2018 (UTC)
 * iPhone is one of the top phone brands in the world, and they had never done this before. ViperSnake151   Talk  05:48, 9 November 2018 (UTC)

The definition seems incorrect.
"Dual SIM refers to mobile phones that support use of multiple SIM cards."

This is incorrect. "Dual" means "two", so dual SIM should refer to mobile phones that support use of two SIM cards. Mobile phones that support four SIM cards should be called quad-SIM. Mobile phones that support multiple SIM cards should be called multi-SIM. --Yejianfei (talk) 13:51, 6 March 2019 (UTC)

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 * DualSim iPhoneXR.png

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