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]];
        }