isoCountryCode in CTCarrier not returning nil when in Airplane Mode

Question

I am using isoCountryCode in CTCarrier in iPhone 6 (iOS 11.4.1). The value if isoCountryCode is returned as "in" when the SIM is inserted and the Airplane mode is turned on.

As per Apple Docs, the value for this property is nil if any of the following apply.

The device is in Airplane mode. (valid in my case)
There is no SIM card in the device.
The device is outside of cellular service range.

Need help to know if I understood the document correctly. If yes, then why am I getting isoCountryCode as "in" in Airplane Mode?

I have filed a bug with Apple for this issue.

https://bugreport.apple.com/web/?problemID=47138150

https://stackoverflow.com/questions/4804398/detect-airplane-mode-on-ios https://stackoverflow.com/questions/37025377/how-to-detect-airplane-mode-flight-mode-in-ios-swift — SPatel, Dec 07 '18 at 08:31
@SPatel: Can you point out the the answer in the links you have provided? I could just find workarounds. — Sahil Khanna, Dec 07 '18 at 11:42
It looks like the documentation needs to be updated or the behaviour of their framework needs to be changed. Log a bug with Apple. — Paulw11, Dec 09 '18 at 22:50
https://stackoverflow.com/questions/38893076/how-to-get-the-country-code-from-simcard-programatically-in-ios-objective-c — Himanshu Moradiya, Dec 12 '18 at 04:01

score 0 · Answer 1 · answered Dec 07 '18 at 06:04

0

Yes, you understand it correctly. isoCountryCode should be nil in flight mode.

answered Dec 07 '18 at 06:04

Markk

86
3

So why am I getting isoCountryCode as "in" when the Airplane Mode is turned on? – Sahil Khanna Dec 07 '18 at 10:48

score 0 · Answer 2 · answered Dec 11 '18 at 09:53

Apple Docs are not clear enough in this case. isoCountryCode does not change when you roaming. It means that OS should only get your carriers code only once. Probably it will be nil when you insert new SIM card when phone Airplane mode is turned on. I'm not an expert in this field, but most probably SIM can hold MCC/MNC code which is statically linked with country. Some test: https://stackoverflow.com/a/5829063/1980246

isoCountryCode in CTCarrier not returning nil when in Airplane Mode

2 Answers2