nope, it is not. That is, if you do call any U Mobile users.
For the amount of reload that you've reloaded, you will get the amount of minutes of free calls to u mobile numbers for the amount of reload of days.
For example, if you have reloaded RM30 then you will have 30 days of free calls to any u mobile numbers.
If I subscribe UMI18 for example, it comes with 30 minutes of free calls to any numbers of any network.
Now, the policy of U Mobile is that free calls given by the UMI18 is used first then only the free call given by the reload.
So, if I've used up all of my 30 minutes of the free calls given by UMI18 to call numbers of other operators, then only I call any umobile numbers, then it will be more "worthwhile". While if you called U Mobile's first then only you call numbers of other operators, it would mean that you'll have less free call time to call numbers from other operators.
Thanks for your explanation.