just contacted them online and this is what I got

celcom:  Sorry to inform you that currently we are having some network issue.
me:  how long will that be?
celcom:  Sorry, we unable to provide the exact time the problem will be solved.
LOL.... looks like a result of over selling

Email billing is ok for me and no issue
Auto debit Ada discount

Then speed n connection also good for this Celcom plan

Email billing is free. 
All good for me at home n at outside. 
Today at outside almost 12 hours no issue with connection

actually i think the other way, they directly tell us the package condition early of the stage. is good for subscriber. i like that. some more 1 year time, telco keep on change plan 1. see the smart plan from digi will know, their marketing kind of dynamic and change plan from time to time. if i am not tie to digi iphone contract early this year. i for sure sign up this already.

That should be Fast Dormancy kicking in. In short, when there's no network activity it reverts back to lower power 3G and when there's activity it switches back to HSPA. The problem here is that if it switches to HSPA slow then you'll feel a delay or worse still as if there's no connection.

yes, normal for celcom.

like I said previously, the network is not stable.

and now with a lot people port in from Maxis. it would become even worse 

what I mean is some maxis user are moving to celcom.

keep the same number, but use celcom line

well Maxis plan is a bit expensive & Data quota less compare with Celcom.

now with people on tight budget, they see which offer value for money. Celcom is the one comes near to it. esp the First Gold plan

well, i can confirm it really is bad
DG is good at stealing, by charging more on potpaid, deleting prepaid amounts, etc...
Maxis... I dont even want to comment on the worst