IOS 判断设备是否可以打电话

NSString *deviceType = [UIDevice currentDevice].model;
if([deviceType  isEqualToString:@"iPod touch"]||[deviceType  isEqualToString:@"iPad"]||[deviceType  isEqualToString:@"iPhone Simulator"]){//
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"提示" message:@"您的设备不能打电话" delegate:nil cancelButtonTitle:@"好的,知道了" otherButtonTitles:nil,nil];
[alert show];
[alert release];
return;

}