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I am using the following code to get network info about my iPhone -

#import <CoreTelephony/CTTelephonyNetworkInfo.h>
#import <CoreTelephony/CTCarrier.h>


CTTelephonyNetworkInfo *netInfo = [[CTTelephonyNetworkInfo alloc] init];
CTCarrier *carrier = [netInfo subscriberCellularProvider];
NSString *osVersion = [[UIDevice currentDevice] systemVersion];

But I get the error - 

Undefined symbols for architecture armv7:
 "_OBJC_CLASS_$_CTTelephonyNetworkInfo", referenced from:
  objc-class-ref in MyClass.o
ld: symbol(s) not found for architecture armv7

Isn't the class a part of the iOS SDK? What am I doing wrong?

JOM
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Suchi
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2 Answers2

77

It is part of the CoreTelephony.framework. You need to add that framework for your code to work.

Community
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Joe
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4

I had a similar issue. Mine was related to having multiple targets, where it would fail on only 1 target.

To resolve it I had to ctrl-click the CoreTelephone.framework and select to add it to all my schemes.

The exact error I was getting was "Undefined symbols for architecture i386: "_OBJC_CLASS_$_CTTelephonyNetworkInfo","

Lasse
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