When Apple announced the new iPhone XS, XS Max, and XR on Sept. 12, the dual sim.
If the processor is your brain, the SIM, or subscriber identity module, is its soul ̵
If you've ever wanted two phone lines on one device, Apple's new dual SIM dual standby technology could be a life changer. It makes it much more practical to have two phone numbers on one phone – one for business, another for personal use. And it wants to make it easier and less expensive to use your own phone when traveling abroad.
Though the beta release of iOS 12.1 includes a crucial component of the technology – eSIM remotely provisioning – Apple will not deliver it to the general population until later. Of course, it will not be the primary factor for the vast majority of people shelling out for a new iPhone ($ 1,358 at Amazon Marketplace) in 2018, but the debut of the iPhone XS, iPhone XS Max and iPhone XR marks a new era of dual-SIM phones going mainstream.
We do not know all about the details of when and where Apple's dual-SIM feature will work. But based on our current understanding of how technology is being implemented, there are some limitations. For now, here's what we know about Apple's dual-SIM.
Note: The information presented below is now as we know it now. If you're looking for iPhone XS, XS Max or XR to take advantage of dual SIM / eSIM technology, make sure you buy an unlocked phone (see below) check with your provider (s) first before committing to a purchase.  What does Apple's dual-SIM announcement mean?
The 2018 iPhones wants to have two different phone numbers on the same phone.
Why would I want a dual-SIM phone?
There are two major benefits. You can have two different phone lines – say, one for business and another for personal use – without the burden of carrying two phones.
Read: So, the iPhones want both eSIM and a SIM?
Yes. The new iPhones wants to have a SIM traditional SIM-based SIM chip that identifies you to your carrier network, and to eSIM, the newer software-based equivalent.
And here's the big thing: the eSIM can accommodate multiple phone numbers – which you can add, delete and configure right from your iPhone's settings. In contrast, a plastic SIM needs to be removed and substituted.
In theory, once eSIM technology is widely supported by carriers in the US and internationally, Apple could phase out the plastic SIM entirely. For now, in the 2018 iPhones both a SIM and eSIM, Apple is covering all the bases.
What is Dual SIM Dual Standby?
Apple's take of dual SIM is called Dual SIM Dual Standby. It means the new iPhone can manage two lines of the phone at once – it makes a call to your phone, and you can read it without making any calls or send it to you. SIM cards .
Note that you can not read and receive data on both lines simultaneously, however;
How is eSIM different from Apple SIM?
Originally known as Apple SIM, the first version of Apple's software-based SIM showed up On the LTE-enabled iPad and Apple Watch Series 3. Analysts believe that the same technology is the same, but that iOS 12 may introduce improvements to the user interface.
Can I add lines from different carriers?
Yes. Apple says that you can add lines from two different carriers – if your iPhone is unlocked . And this is the major catch. If your phone is not unlocked, both plans must be from the same carrier. And, if a CDMA carrier – such as Verizon, Sprint, US Cellular, Boost and Virgin – provides your first SIM, your second SIM will not support CDMA.
Read: Unlocked phones vs , locked phones
Can I use eSIM on a locked iPhone?
When you buy an iPhone directly from Apple, it's unlocked at Apple Store, it's unlocked (eg AT & T, Verizon, Sprint). A Genius inserts on AT & T SIM, for example, activates your phone on AT & T's network, and you're off to the races.
But once a phone is locked, it's locked . As my colleague Maggie Reardon explains, "A locked phone does not have a software that unlocks it." the software Once a device is unlocked, you can pop out of the SIM card and put in a different SIM and get service. " Most carriers require you to pay for your phone before they leave. (AT & T's Unlock Portal provides a checklist of requirements for unlocking your phone and switching to another carrier.)
An unlocked phone with a SIM needs a new SIM in order to switch to a new carrier. ESIM, on the other hand, can accommodate multiple SIM profiles from multiple carriers. Until now, eSIM has not garnered much support from carriers, who are understandably wary of making it easier for customers to activate another carrier's service.
Apple wants to launch its eSIM feature?
Apple wants to activate eSIM functionality in iOS 12.1 update, currently in beta. US carriers want to get a QR code before it can be activated using the eSIM – which is likely to coincide with the public release of iOS 12.1.
How to setup eSIM on the new iPhone?
Owners of a 2018 iPhone wants to be able to access the eSIM through the iPhone settings. According to Apple VP Phil Schiller, you'll be able to use the QR code, which will kickstart the process for activating a second line. Then, iOS will let you select a default line for calling and messaging, choose a label for each line, and so on.
Apple has listed steps for eSIM on its support site.
Can eSIM be overwritten?
eSIM can be overwritten and accommodate a phone plan from any carrier that supports the technology.
Which carriers support eSIM technology?
Apple says that eSIM works in 16 countries; in the US, AT & T, T-Mobile and Verizon currently support the technology. (A Sprint spokespersonthat the company wants to support feature in the near future.) Internationally, participating carriers currently include Truphone, Bell, EE, GigSky, Vodafone, Jio, Airtel and Deutsche Telekom.
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Kent English / CNET
Are there other phones that have dual SIM technology?
There are plenty of phones that can accommodate two SIM cards, but most of them are not available in the US, but only a few so far that support eSIM. The Google Pixel 2 has eSIM – but it's usually for Google's Project Fi cellular service.
Do you have any other phone numbers?
No, you don 't need approval or permission to add a second phone number. In fact, the major upside of eSIM is that you can not even remotely.
Why does not eSIM work in China?
Apple announces a special edition of the new iPhones for China, which will have two SIM card slots instead of eSIM technology. According to Neil Shah, who covers mobile technology for counterpoint research, dual-SIM technology is popular in China – but very few carriers have built it out support for eSIM technology.
Will we see more eSIM phones in the US?
Probably. After all, Apple often sets the trends. Will Stofega, who has said that carriers have been made of eSIM, fearing that it could lead customers to jump from plan to plan. In the US and abroad, especially if there are any carriers in the US and abroad done manually in stores, until now. ($ 750 at Best Buy) :
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