NB. Do see this warning first: http://satechhelp.co.za/15281/Sassa-Power-Manje-Fraud-Warning-Easypay-Net1-Cps
Hey Adrian, dial *130*4444# from your SASSA registered cell number and follow the once-off Umoya Manje service registration. You will afterwards be able to purchase advanced electricity (*120*4444#) and airtime (*130*4444# or *120*4444) from thereon by dialing the given USSD codes. Only do note that the *120* service charges 20c per every 20 seconds - so you need to have little airtime in your phone (*130*... is free and offers R5 airtime to get you started).