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What is an eSIM? Here’s everything you need to know
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What is an eSIM? Here’s everything you need to know
By Emma Lunn and Sophie Venz
Updated February 16, 2023
What is an eSIM?
But so-called eSIMs are designed to supersede old-style physical SIMs (and, in case
you’re wondering, the ‘e’ stands for embedded).
Instead of being a removable plastic card inside your phone, an eSIM is a small chip
embedded in your handset. You can’t remove it and put it in another phone.
However, the information on an eSIM is rewritable. This means you can change your
network without removing your SIM and inserting a new one.
A time when eSIMS completely replace plastic SIMs is probably still quite some way off.
At the moment eSIMs are more commonly used as the second SIM in a dual-SIM
handset.
What are the Advantages of an eSIM?
1. It’s easier to switch networks. An eSIM makes it much easier to switch mobile
networks. Instead of needing to order a new SIM, waiting for it to arrive, then inserting
it into your phone, you can switch to a different network with a phone call or online. You
also won’t need to go hunting for a SIM ‘ejector tool’ to remove the old SIM from your
phone.
2. You can temporary change to another network. Up to five virtual SIM cards
can be stored on one eSIM at a time. This means you can quickly switch between
different networks if you find yourself in an area without a signal on your usual network.
It also makes it easier switch to a local network while travelling, without needing to
physically insert a local SIM. Using a local mobile network while abroad can be much
cheaper than paying roaming costs to your Australian network. Plus, not removing your
Australian SIM from your phone will also reduce the risk of losing it.
3. Allows you to have more than one SIM. eSIMs also offer the same advantages
as dual-SIM phones with two slots for traditional plastic SIMs, the most obvious being
that you can have two phone numbers on one device.
This can be handy if you want one number for personal use and another for business –
but you don’t want to carry two phones around. You’ll be able to receive phone calls and
texts on both numbers all the time and choose which SIM to use for making calls,
sending text messages, or using data.
4. Uses less physical phone space. Another advantage of eSIMs is that they will
eventually negate the need for a physical SIM card and its tray. Smartphone
manufacturers could potentially use this space to increase a phone’s battery size or add
more features to a handset. Fewer holes in a handset also mean more protection from
moisture and dust, so less breakdowns.
There’s also the potential to make handsets smaller in some cases. But the real space
advantage is for wearables such as smartwatches, as people don’t want to wear an
enormous device on their wrist. The Apple Watch Series 5 and Series 4 already have
eSIMs, as do Samsung Gear S2 and Gear S3 smartwatches.
What are the Disadvantages of an eSIM?
There are a couple of potential downsides to eSIMs, though.
1. Not as easy to quickly switch devices. Right now, if your handset stops working
you can easily remove the SIM and put it in another phone, keeping your number and
contact information (if your contacts are stored on the SIM).
This will be much trickier with an eSIM – although storing information and contacts in
the cloud is designed to make it easy to transfer data such as contacts from one phone to
another.
2. Nowhere to hide. You also can’t remove an eSIM from a device, which may be
viewed as a downside if you have concerns about your movements being tracked. But
this may also be an advantage as it means phone thieves cannot easily hide the location
of a stolen phone.
Do all Smartphones Have An eSIM?
At the moment only a handful of the most recent smartphones and wearables have an
eSIM. These include:
• All of Apple’s latest iPhones – the iPhone XS, iPhone XS Max and iPhone XR, plus the new
iPhone 12 range, and the iPad Pro
• Samsung’s Galaxy S20, S20+ and S20 Ultra
• The Google Pixel 3 and 3 XL
• Motorola’s Razr (only an eSIM, it doesn’t have a physical SIM card)
• Samsung Gear S2 and Gear S3 smartwatches
• Apple Watch Series 3, 4 and 5
Do all Networks Support eSIM?
Globally not all networks support eSIMs – but they will do in time when this technology
becomes standard.