Iphone won't take sim card
How to unlock iphone
iPhone 11, iOS 14
How to unlock iphone
iPhone 11, iOS 14
It might be locked to a previous carrier. Should be this case, only that carrier can unlock that device, if you are eligible. See this support article:--> How to unlock your iPhone for use with a different carrier - Apple Support
Regards
Giulio
It might be locked to a previous carrier. Should be this case, only that carrier can unlock that device, if you are eligible. See this support article:--> How to unlock your iPhone for use with a different carrier - Apple Support
Regards
Giulio
If the phone is locked to a carrier you must contact that carrier and request that they unlock it. See→How to unlock your iPhone for use with a different carrier - Apple Support
Find your model below to locate the SIM tray. To pop open the SIM tray, insert a paper clip or a SIM-eject tool into the hole beside the tray. Push in, towards the iPhone, but don’t force it. If you're having difficulty ejecting the SIM tray, take your device to your carrier or an Apple Store for help.
After you remove your SIM card from the tray, notice the notch in one corner of the new SIM card. Place the new SIM card into the tray—it will fit only one way, because of the notch. Then insert the tray into the device completely and in the same orientation that you removed it. The tray also fits only one way.

Find the SIM tray on the left side:
In China mainland, the SIM tray on iPhone 12, iPhone 12 Pro, and iPhone 12 Pro Max can hold two nano-SIM cards.

Find the SIM tray on the right side:
In China mainland, the SIM tray on iPhone 11, iPhone XR, iPhone XS Max, iPhone 11 Pro, and iPhone 11 Pro Max can hold two nano-SIM cards.

Find the SIM tray on the right side:
Iphone won't take sim card