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.

Related questions

How to detect call incoming programmatically

I need my app to send a notification when there is a call (incoming call, connected, call ended) I registered my viewController with notification. [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(callReceived:) name:CTCallStateIncoming object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@…

Read More
How can I use private APIs to block incoming calls in an iOS application?

I would like to be able to selectively block incoming calls in an iOS application I'm writing. This is intended for personal use, not the App Store, so I'm fine with using private APIs to accomplish this. I have recently …

Read More
iPhone - Track cellular data usage

Is there a way to track cellular data usage on iPhone ? There are lot of apps which does the same like 'Dataman' and 'DataUsage' Basically I am looking for a programmatic way to get information stored in Settings -> …

Read More