Yes, you can! This is available for all networks--that means Smart, Sun, TM, Talk n Text!
To send load to someone else, just input the mobile number of the recipient through the Buy Load screen:
Please double check the mobile number that you have entered and verify if it is the correct mobile number! All Buy Load transactions are final and cannot be reversed once done.
A better way to input the mobile number is by selecting one of your contacts through the phone book icon on the right side of the number field.
After that, just select the amount and type of load you want to give that person.