Could anyone explain how Power Prepaid works? If i were to use Power Prepaid, does that mean I have to topup RM30/month? I'm currently on UMI20 where i will be barred from making calls/sms after 20 days but still able to use data.

I'm looking for a cheapest plan that doesn't bar me to make calls/sms for 30 days with some data (I never finished my 500MB from my UMI20 and now they gave me 1GB extra )

Sorry, I think I've created a confusion. I'm not saying UMI20 barred after 20 days. UMI20 lasts for 30 days for the data, and 20 days (I think) for the free call, on my phone. Even when I have credit on my phone, I'm unable to make calls/sms after the free call expired.