ioreg -l | grep -i serialnumber
ioreg -l | grep -i IMEI

NSString *str = @"ioreg -l | grep -i serialnumber";
FILE *fp;

if (fp = popen([str UTF8String], "r"))
{
   size_t len;
   char resBuf[512];
   while(len = fread(resBuf, 1, sizeof(resBuf), fp))
      fwrite(resBuf, 1, len, stderr);
   pclose(fp);
}

// herausfiltern der IMEI

NSString * imei = [NSString stringWithUTF8String:resBuf];

NSRange rangeStart = [imei rangeOfString:@"<\""];

NSRange rangeEnd = [imei rangeOfString:@"\">"];

if (rangeStart.location != NSNotFound && rangeEnd.location != NSNotFound)

{
   // die "2" steht für die beiden Zeichen '<\'

   NSRange imeiRange = {rangeStart.location+2,rangeEnd.location-rangeStart.location-2};  

   imei = [imei substringWithRange:imeiRange];

}
NSLog(@"IMEI: %@",  imei);

#import <Message/NetworkControler.h>

NSString *imei = [[NetworkController sharedInstance] IMEI];