U actually dont need unlimited. 1GB package should be more then enough.
I was on the 5GB plan earlier. Then I realize I am on WiFi (unifi 20mbps) when I am at home. Its way faster then using telco internet connection.
I turn on my data when I am out. Quite heavy usage also myself (Whatsapp, viber, YM, Skype, MSN, GTalk, BBC news, YouTube, and LYN browsing-PMing, Push mail activated - GMAIL 24 hrs a day.)
I still cant reach the 1GB quota. I also tether sometimes for light surfing and youtube where there is no wifi connection for my netbook/galaxy tab.
So my advise is get the 1GB (RM48 plan) if not enough then you can upgrade as there is no contract.
Let me enlighten, I am on DiGi Postpaid. I am not tied down with any phone contract. So I have the benefit of jumping packages/terminating my data package whenever I want.
DiGi Data Plans - No contract/device bundleEdit :
I have also include Maxis/Celcom/UMobile data plans. To me their plans are the most ridiculous. Its extremely overpriced.
Maxis Data Plans - Postpaid, no device bundleCelcom plans are more or less like DiGi.
Celcom Data Plans - Postpaid, no device bundleUMobile plans are also interesting and reasonable. Issue is their customer service is never reachable. No emails are replied. No twitter complains will be entertained. So its basically a telco to choose if you are not a very serious business user. Internet is super fast at certain location. DR - Domestic Roaming capability, which means you can jump onto Celcom coverage where there is poor coverage of signal. Other then that nothing much.
UMobile Data Plans - Postpaid, no device bundleHope this sheds some light on those who are planning to get a data package bundled with their postpaid lines. I would definitely encourage a data plan with a smartphone. Without a data plan a smartphone is not very smart.

Planning to get Celcom postpaid Mbasic plan for me and my wife. i think 1 Gb should be enough for each of us. but the MAdvance 3Gb plan looks tempting to me. but if subscribe, need to spend RM200++ for phone bill on monthly basis for both of us,huhuhu