How do dual SIM card phones work and why would I want one?
Feb 22, · Dual SIM Dual Standby lets your smartphone have two active SIM cards, and they both use only one radio transceiver. However, they are both active only as long as you are not using them, hence the name of Dual Standby. As long as the SIM cards are both in Standby mode, you can make and receive calls on any of them. However, once you take a call on one SIM card, the other . Aug 05, · The first, Dual SIM Dual Standby, will put one SIM on standby as the other one is in use. Yup, that means the other line will be engaged if anyone tries to .
Here's why that's a good thing. When I think about the features that I need in a smartphone, I tend to be pretty practical. Sure, apps, a media player, and a good-quality Web browser are great, but what I really want is how to get investors for a nightclub good dual-SIM card phone.
And fortunately for me, the Mobile World Congress didn't disappoint. Now I know that dual-SIM phones have been around for yearsbut the biggest OEMs in wireless haven't put a lot of resources behind them.
Smaller manufacturers, particularly from China, have made up the slack, but those devices can be hard to find outside of Asia. What's worse, most of the devices that I've tested are pretty forgettable. The Duet D was a little better, but it stopped working completely after a two-week trip to Australia and a shorter trip to Spain. Indeed, the devices that CNET handled were a diverse bunch.
At the bottom end, the basic Nokia has a signature Nokia candy bar design that may remind you of the company also showed a dual-SIM phone at the show. I'm happy to see a stronger push from top manufacturers.
SIM cards, as I'm sure you know, are the little plastic or one day paper cards that give your phone its number and identify you as as a subscriber to a carrier when you make a call.
You also can transfer your number to another handset just by swapping the card out. So, as you'd expect, a phone with two SIM cards can hold two numbers and two identities at once. You can make or receive eual and send or receive texts on either number and give each number only to the people that you chose. Imagine these scenarios. Going abroad Let's say that you're going to Greece on vacation.
You want to take a phone so you can keep in touch with local friends and traveling companions and still be reachable by your family back home. Traditionally, you had two choices: either use your existing number and pay expensive carrier roaming fees or take an unlocked handset and pair it with a Greek SIM card.
Each option has its pros how far from charles de gaulle to disneyland paris cons. Keeping your usual number meant that the folks back home can reach you without making an international call.
Wjat the the other hand, you'd have to fork over roaming fees to call home and to reach anyone in Greece. Getting a local SIM is great for calling within Greece, but you'd still have to pay more to phone anywhere else. Also, remember that once you remove a SIM card from a phone, the number attached to it is essentially useless. If someone tries to contact you, the call goes straight to voice mail and you get no alert that they rang.
Similarly, text messages would be lost in space while your SIM card is out of commission. With a dual-SIM phone, however, you don't have to select one or the fards. Anyone at home can reach you immediately and cheaply not vice versa, though and you can chat with local friends without incurring roaming fees. It's convenient, it saves money, and you don't have to purose around two handsets. Work and play A dual-SIM phone also is a great way to carry one device while keeping your personal and work lives separate.
You don't have to give your personal phone number to your boss or clients and you can keep your work number out of the djal of telemarketers. Also, when rhe unknown number shows up on your caller ID, you'll be able to see which line is ringing and get a clue as to what the call is what doesnt kill you lyrics. When can I get one?
The good news is that you can buy a dual-SIM phone now. There are a growing number available online, so I'd encourage you to read reviews and compare prices to wbat what is the purpose of dual sim cards right handset for you.
National Geographic, for instance, sells a few models like purpoae Talk Abroad Lite made by a company called Blu. I've also seen the handsets in brick-and-mortar stores, though to a lesser degree.
If you want to buy one from a real shop, I'd try independent and specialty retailers. Unfortunately, it will be a long time before a U.
S carrier sells a dual-SIM phone, if it happens at all. Carriers, after all, would prefer that you use a handset locked to their off. At home, they'd rather how many times to pump breast milk not swap in different provider's SIM. And while this last part is changing to some degree, carriers would prefer that you use one of their roaming partners when you take your phone overseas they get some money that way.
So if you really want a dual-SIM phone, screw your carrier and go buy one. You can use it all the time or just keep it in a drawer for those international trips. Either way, you'll get something out of it. Be respectful, keep it civil and stay on topic. We delete comments that violate our policywhich we encourage you to read. Discussion threads can be closed at any time at our discretion. Kent German. Now playing: Watch this: Hands-on video with Nokia's back-to-basics Discuss: Why you want a dual-SIM phone.
Why are Dual SIM smartphones useful? The advantages of Dual SIM!
Mar 01, · A dual-SIM phone also is a great way to carry one device while keeping your personal and work lives separate. You don't have to give your personal phone number to . A dual SIM phone lets you talk on one line and still receive calls from the other. This means you can put the first call on hold to answer the other instead of having it go straight to voicemail. You can use your phone internationally without having to worry about switching your regular SIM card in and out. Sep 11, · SIM stands for subscriber identity module or subscriber identification module. It’s the little integrated circuit, stuck onto a cheap piece of .
Have you encountered Dual SIM smartphones in shops? Do you want to know what makes them useful and how the Dual SIM technology works?
If you want to know what the Dual SIM technology is, how it is implemented in modern day smartphones, its advantages and disadvantages, read this article:. For some people, having a Dual SIM smartphone can be useful. Take, for instance, businessmen and women who tend to have one phone number for their work and another number for their friends and family.
A business person can either use two different smartphones, one for work and one for personal use, or use a Dual SIM smartphone, with both phone numbers active on it.
Having one smartphone to carry around is more comfortable than carrying two smartphones. Another situation in which you might be interested in a Dual SIM smartphone, especially if you live in an emergent market, is when you want to use one phone number for phone calls, and the other for connecting to the internet.
Some mobile operators have good voice plans, but pricey data plans, or the other way around. On a Dual SIM smartphone, you can combine two different plans from two different operators and get a cheaper bill at the end of the month. Another benefit is that you can use two mobile providers simultaneously if your phone is not locked into a specific network, which means that you can get more mobile coverage.
If you travel a lot abroad, you can use one SIM card in your home country and the other SIM slot for cards you purchase in the countries you travel to, for better or cheaper coverage. If you decide to purchase a Dual SIM smartphone, you should know that there are several types of Dual SIM implementations that work differently, and some are better than others.
These are the types of Dual SIM implementations available:. To make it easier for you to understand the differences between the different kinds of Dual SIM implementations, we created this simple comparison table:.
The short answer is Yes , but it depends on the Dual SIM implementation that was chosen by the manufacturer of your smartphone. Manufacturers look at how much their smartphones cost to build and their profit margins. However, if you want to build a Dual SIM smartphone that supports 4G connections on one of its SIM cards and 3G or even 4G on the other, that would mean that the processor on the smartphone must be powerful enough to support two high-speed data connections simultaneously and probably the costs would be rather high.
However, although the implementation lets you use two different mobile phone numbers simultaneously, it only works in some countries where carriers offer support for eSIMs. Unfortunately, the list is rather short at the moment - 24 countries, which you can see on this Apple web page: Find wireless carriers that offer eSIM service. Dual SIM smartphones can be useful in some instances, and smartphone manufacturers have started to notice that people want such devices.
As such, more and more Dual SIMs appear each year. Let us know about your experience with this technology and what you think about it, in the comments below. This site, like many others, uses small files called cookies to help us improve and customize your experience.
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