$4.90 Kogan prepaid sim with 23GB data, unlimited national call & text expires 30days – There was a promotion $4.90 sim which gives you $49.90 23GB data, unlimited nataional call and text expire 30 day. I ordered online in their website and immediately I got confirmation with the voucher and within a week I received 2 Kogan sincard. By activating first time using my mobile phone web browser it wasn't going well but later I realized I have to use computer and pretty easy I did it. After I activated, there it is 23GB data, unlimited call & text expire 30days while my optus one expires 28 days with less data. Thanks to Kogan mobile.