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Sep 16, 2024 · If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad. If you get an alert that says Invalid SIM or No SIM Card installed, follow these steps. Make sure that you have an active plan with your wireless carrier. If your iPhone is locked to a carrier, it can be used only by that carrier.
Jan 13, 2019 · The most likely symptom would be a slowing of the phone, as it repeatedly attempted to retrieve data from the failing SIM. It could theoretically slow it down a whole lot, depending on how the phone interpreted the data fault.
Oct 9, 2020 · The central point of connection between your iPhone and Cellular data is your SIM card. Sometimes, removing and immediately replacing your SIM card back into its slot can resolve any Cellular interference your iPhone's experiencing.
Aug 1, 2022 · Learn what to do if your iPhone or cellular iPad isn’t recognizing the SIM card and shows “No SIM,” “SIM Not Valid,” or other SIM-related errors. You can’t make regular calls, use mobile data, or send and receive non-satellite texts if there are SIM-related errors on your iPhone.
Reinsert the tray and retest. Try the SIM from a friend or family member with the same cellular carrier. If it works, replace your SIM card. You can request one from your service provider, or visit one of their physical locations. As a workaround, use your phone’s eSIM instead.
Nov 12, 2021 · An iPhone usually says a SIM is not supported because your iPhone is locked to your carrier. This means you can’t insert a SIM card from a different carrier if you switch. To check if your iPhone is locked, open Settings and tap General -> About -> Carrier Lock .
You can check if your SIM is faulty by inserting it in another phone. Call customer services on 150 (from an EE phone) or 07953 966 250 (from other phones) to have a new SIM sent to you. You can also visit your nearest EE store to order a new SIM.