IOS 调用拨打电话Api

// 判断设备是否有通话功能
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:@"模拟器没有通话功能" delegate:nil cancelButtonTitle:@"好的,              　　知道了" otherButtonTitles:nil,nil];
[alert show];
return;

}
else
{
NSString *telUrl = [NSString stringWithFormat:@"telprompt:%@",personInfo.phoneNum];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:telUrl]];
}