iPhone - Detecting SIM card availability

iphone ios core-telephony
Abdalrahman Shatou picture Abdalrahman Shatou · May 7, 2012 · Viewed 15.8k times · Source

I am using the answer in this topic. iPhone - how to determine carrier of the device (AT&T, Verizon, etc?) which is the same as getting operator details in iphone. Although it works fine when using a sim card, the returned carrier name if there is no SIM card is the old carrier name. It doesn't detect that the SIM is removed.

I know this contradicts with Apple documentation that if there is no carrier, CTCarrier object shall be nil. But in my app I logged the carrier info and it gives me the latest carrier name although no sim is installed.

Answer

Evan Mulawski picture Evan Mulawski · May 7, 2012

According to the documentation for [CTCarrier carrierName]:

If you configure a device for a carrier and then remove the SIM card, this property retains the name of the carrier.

As far as I know, you cannot detect if the SIM card is installed. You can only determine if a WWAN connection is available using Reachability.

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