Whether you're selling your old iPhone, trading it in for a new model, or sending it away for repairs, it's important that you remove the phone's SIM card. A SIM card - or Subscriber Identity ...

Here’s how to access information about whether an iPhone is locked to a Network Provider. (This information has been available in iOS since iOS 14 arrived in 2020). To access it open Settings.

Short for embedded SIM, eSIM involves activating a mobile network on a SIM card already present in the iPhone for phone calls, text messages, and internet connections.