Your Apple device is running an iOS older than 14.5, or your Android device is running a system older than Android 11. Most smartphones made from around 2015 onwards will use a nano SIM card. That includes big name handsets like the iPhone 14 range, iPhone 13 range, iPhone SE (2022), Samsung Galaxy S22 range, Samsung Galaxy S21 range, OnePlus 10 Pro, and many, many more. What is the most common size SIM card? Additionally, there is an increased cost to simultaneously operating the two types of network required to support 2G/3G and 4G/5G services, which is encouraging providers to end 2G and 3G. The money saved from these closures can then be invested in making improvements to the 4G and 5G network. The switch off may be problematic for customers using older mobile devices and services that rely on these networks, meaning the device, or at least the Sim, may need replacing. The exception is if you want to use an eSIM, in which case you will usually need to request one – though many networks don’t support them. 3. SIM adapters and DIY downsizing

The UK 3G network switch-off: what you need to know - Which?

An eSIM is an embedded SIM card (that’s what the ‘e’ is for) meaning that you can’t remove it from your phone or other device. This is the newest type of SIM and it’s found in quite a lot of modern handsets, such as the iPhone 14 range – along with many other iPhones – and the Samsung Galaxy S22 range. You don't have permission to access "http://www.argos.co.uk/browse/technology/mobile-phones-and-accessories/sim-cards/c:30145/sim-card-plan:pay-as-you-go/" on this server.Some phones can use wifi to make voice calls. Wifi Calling (also called Voice over Wifi or VoWifi), helps you make and receive calls even if you can't connect to the mobile network, like when you're on the London Underground. When connected to wifi, you can just dial the number you want to call like normal.

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We now have 5G in parts of most major UK towns and cities, as well as lots of smaller towns and villages. Find out more about O2 5G.

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On Android: Settings > Connections > Mobile networks > Network mode. If you're using a dual-Sim phone, tap the active Sim. Nano SIM cards are the most common size – most smartphones made from around 2015 onwards use a nano SIM card. Can you convert a standard SIM to a nano SIM? If you have the wrong SIM card size for your phone, then wherever possible the best thing to do is simply to request a new one from your network and get your number transferred to that. Update 18 September 2023: EE announced it still start its nationwide 3G switch off from January 2024, and expects to have it fully phased out by March 2024. It is also offering a free 4G-ready mobile phone to any EE customers who are registered as vulnerable and still reliant on the 3G network, to ensure they are not left behind.

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No other differences exist between these SIM card types, it’s literally just the size. If there were other differences, then combi SIMs wouldn’t really be possible. An eSIM meanwhile is quite different, as detailed above. 2. Which SIM do I have, and which do I need? The UK is not the first country to start phasing out 3G and 2G services. The USA has already switched off all 3G networks, and other countries all over the world will be following suit, with varying timetables. If on the other hand your SIM card is too small for your phone, then you can get a SIM adapter. This is a plastic frame that you can put your SIM card in, to essentially upsize it to micro or standard size. A mini SIM card is another name for a standard SIM. It was originally called a mini SIM because when it first launched there was a larger full-size SIM card in use too, but these larger ones are no longer used, so mini SIMs have become standard SIMs. What is a SIM card adapter? However, while that means that the most common SIM cards are a lot smaller than a standard SIM card, the older, larger SIM card sizes are still in use too in some older devices, and in some devices that don’t need to make the most of their space. 1.2 What are the different SIM card types?

A SIM card adapter is a piece of plastic that you can place a micro or nano SIM card into to convert it into a larger size. What happens if you take out your SIM card and put it in another phone? Note that standard SIM cards are also sometimes known as regular SIMs or mini SIMs – the latter because there was an even bigger credit card-sized SIM card available when these launched, but they’re no longer used. Failing that, unless it’s one that you’ve had for many years it’s probably a nano SIM, since they’ve been the most common for 6+ years. In most cases you won’t need a new SIM card to access 5G – if you have a 5G plan and a 5G phone, then your current SIM card should connect to 5G networks just fine. Your network may send a software update to your SIM card when it detects that you’re trying to connect to 5G, but that’s all. You don't have permission to access "http://www.argos.co.uk/browse/technology/mobile-phones-and-accessories/sim-cards/c:30145/" on this server.

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A combi SIM is a SIM card that contains all three possible removable card sizes, with perforations allowing you to pop out the size you need. These are sometimes called trio SIMs or multi SIMs. Are SIM cards universal? Instructions on how to take these steps can be found using our device-specific trouble-shooter here.

This is a test of Emergency Alerts, a new UK government service that will warn you if there’s a life-threatening emergency nearby. If it's available with your device, you can use our Wifi Calling servicemake calls, receive calls and send and receive text messages when you have no signal. We also have over 16,000 O2 Wifi hotspots available to connect to for free, which offer speeds up to 10 times faster than a normal mobile connection. 5G explained isn't the only communications infrastructure that's being modernised – read about the move to Digital Voice and the landline phone switch-off, to find out what it means for you. What does the end of 3G mean for my mobile phone? Superdrug adds new 'VIP Rewards' offers to its existing loyalty scheme – here's what you need to know But while you’re sure to have at least one gadget in your life that needs a SIM card, not all SIM cards are the same, as they come in three different sizes and four different common types.