I understand your concern, but it is perfectly acceptable to use your previous sim card with your new iPhone. If you want to switch sim cards to the newer sim card you will need to contact AT&T and provide them with the new sim card number so they can update your account.
Can I use my old SIM card in iPhone 11?
Answer: A: No. It won’t have any negative effect. There is nothing to be concerned about.
When I get a new iPhone should I put my old SIM card in?
It should be the same under the new contract. Or they should have advised you how to keep your old number. When I upgraded last year, I took out the SIM that came with the phone, and put in my new SIM card. Everything sync’d just fine.
Does my new iPhone 11 need a SIM card?
A SIM card is required in order to use cellular services when connecting to the AT&T network. If a SIM is not in the device, “No SIM” will display in the Control Center.
Does it matter if you use an old SIM card in a new phone?
SIM cards are designed to enable users to transfer information from an old phone to a new phone with minimal effort. As long as it fits in your new phone, you can use your old SIM card in your new phone, according to AT&T.
What happens if you switch SIM cards in iPhones?
Answer: A: If you change it for a SIM from the same carrier, nothing happens, the device continues working as before. If you change it for a SIM from another carrier and the phone is locked to the original, then it will work as a fancy iPod, none of the phone capabilities will be available.
What happens if you take out your SIM card and put it in another phone?
When you move your SIM to another phone, you keep the same cell phone service. SIM cards make it easy for you to have multiple phone numbers so you can switch between them whenever you like. … In contrast, only SIM cards from a specific cell phone company will work in its locked phones.
Should I put my old SIM in my new iPhone 12?
In most cases you can just move your old one to the new phone. FYI, when we got the iPhone 12, we picked it up at the Apple Store and they advised using the new sim because of the new 5G chip.