SMS Units for Transfer:
You can't transfer less than 100 sms units.
You can't transfer above your current credit balance.
Transferee would be charged 50 sms units on each transfer that is 1,000 sms units or less.
Transferee would be charged 100 sms units on each transfer above 1,000 sms units.
Once Transfer is initiated, it can no longer be reversed.
A minimum of 1 sms unit must remain in your sms account after the Transfer has been made.