WIG/Sms banking on CellC and Virgin

[kiepie]

Anyone know why we can't use WIG Absa Cellphone banking if you have an CellC or Virgin sim card?

(PS. It's the banking which is done via sms on your phone menu)

WIG Cellphone banking allows you to transact from your bank account via secure sms. A banking menu is downloaded onto your SIM card allowing you to conveniently select transactions with a click of a button. All transactions performed via WIG Cellphone banking are secure as all information sent from your Cellphone is encrypted. WIG Cellphone banking is available via Vodacom and MTN.