There is no minimum amount of data to share. In the MySmile Portal you can select a quick pick amount of data to share between SmileNumbers in your profile, or enter the amount of data you wish to share.
You can only share Airtime and Data between the SmileNumbers linked to your account, within your profile.
To share Airtime between SmileNumbers linked to your account, log into the MySmile Portal, using your SmileNumber/Username and Password. Then click on the share icon and select Airtime, as well as the linked SmileNumber in your profile. Enter the amount of Airtime you wish to share. You will receive a confirmation message that Airtime was shared successfully. You can also go to Balances after sharing to view the Airtime balance of the SmileNumber you shared to.
You can share airtime and data credit between the SmileNumbers linked to your account. Voice minutes cannot be shared.
SelfCare - FAQs