This, I believe, causes confusion and makes people think we have Android SIM cards and iPhone SIM cards, and, in turn, you see questions online such as, Can you put an Android SIM in iPhone. These are the basic differences between a locked and an unlocked phone, because this is really important to answering a question of can you put an android sim card in an iphone. Remember, there is no such thing as iPhone and Android SIM cards, since SIM cards can function on Android phones as well as iPhones, provided that they are on the same networks, or that the phones are completely unlocked. You can use a Samsung SIM in iPhone, provided that the Samsung phone is not locked with specific carrier network, or is with same carrier with the iPhone.
A free SIM can be used on any Android phone locked to the AT&T network, while an iPhone locked to T-Mobile. You will have to check if the SIM you are using in your Samsung Note 10 will fit into your new iPhone 12. If your Android SIM is a Nano, you will be able to put it in a new iPhone without too much trouble, but if it is Micro or Regular, then you will have to convert it into Nano. If your phone does not come with Nano-SIM, then you can cut it to size with ease.
A Combi-SIM is probably something that a SIM-only provider will send to you, since it contains all three sizes, and you will pop the one that fits in your phone. Most carriers ship with the triple-cut SIM, meaning that the card comes in three different sizes. The standard SIM measures 25 by 15mm, and was used in phones up until 2010, and a handful of phones since. The micro SIM measures 15 by 12mm, and was used in phones starting in 2010, and you will still find a handful of phones running on those right now. Full-size SIMs are usually found in older phones, such as iPhones before the 3GS, and older Android models. Switching between Android phones and iPhones can be difficult, as you need to adapt to an entirely new OS.
If you swap in a SIM card from a different carrier, and the iPhone 3GS or older is locked to the original, it is going to run as a flimsy iPod, with none of the phones features. The SIM only contains the phones info and contacts. All you have to do is take your SIM out of the current phone that has it, and put it in the new unlocked phone. If you are taking the iPhone that you already have, then you have to take out your old SIM card and set it aside. Once done, you can remove your old SIM card and swap it for the new SIM. After backing up the older iPhone, you will have to put the new, 5G-compatible SIM into your new phone.
You will need to copy your SIM contacts from the older iPhone into the new one. After you have completed the usual prompts, head into your phone app and copy any SIM contacts you have into the iPhones storage. On your iPhone, go to Settings > Contacts > Import SIM contacts and follow the on-screen instructions.
Or, you can use the shortcuts provided here to move contacts from Android to the iPhone. Instead of manually entering all of your contacts on an Android phone, you can export iPhone contacts a couple different ways. You can copy your contacts from an Android phone onto a SIM card, then transfer it over to a new iPhone 12.
As long as both devices are using the same SIM, switching phones is just as simple as you described. When you switch a SIM into a different phone, you are keeping the same phone service. Making the switch yourself takes just a few steps, and Apple has even created a dedicated app to help. Often, you can move your SIM card to another phone, as long as that phone is unlocked (meaning, not tied to any carrier or specific device), and the new phone accepts your SIM.
If you are making a permanent iPhone-to-Android switch, I recommend going into the nearest store to your wireless provider and having them transfer your phone number from the iPhone to your Android. If you are looking to delete your SIM card from an iPhone or Android device, you came to the right place. Apps, pictures, and videos are stored in the phones storage — either on its internal storage or in the memory card — and they are not deleted when you remove the SIM. If you need to switch to a new SIM, but you do not want to lose all of the information stored on the SIM, you can use the SIM Card Copier to transfer the information from one SIM card to another. Both Apple and Google have great app stores.
Just because you see a SIM card in an iPhone locked to the AT&T network does not mean Apple makes the SIM card, the same goes for buying an Android phone locked to AT&T. This goes to buying iPhones on AT & T networks too, since iPhones are going to be locked. Carriers who are giving you the phone as part of the bundle are incentivized not to let it go.
Most current iPhones will work on any carrier, but if you are buying an older used iPhone, make sure that it is compatible with your cell phone provider. If you are a frequent traveler, you could just bring the older iPhone with you and use it in the new country.
While many carriers in the U.S. and Canada have no policies banning SIM swapping, we do think that you should know that just popping said SIM into your unlocked phone, or into a different carriers phone, might not work, unless you have upgraded your subscription plan. The same process applies for an iPhone, but you will have to make sure that your new SIM slots will accept the eSIM. This kind of card is used on phones that are not unlocked, and it is free once you enroll in a new plan.