I was with Maxis for 11 years, ok, 10 years and 10 months to be precise. I just moved to DiGi less than a month ago.

Why? I recently noticed that the (Value Plus 50) RM50 package I was using, Maxis only deduct calls/sms to Maxis numbers. You call/sms to other telcos, they charge you separately at a higher rate, whereas DiGi flat rate is call/sms to ALL NETWORKS (in Malaysia). 

No wonder I keep having to pay extra when I don't really make many calls/sms.  I have been paying for it without noticing it (yes, I ignorant)...maybe because the total amount didn't quite pinched me hard enough.

So when I was looking for a new phone, looking into other telco phone packages then I realize I have been paying extras.  I have like RM20-30 burnt every month with Maxis. I got angry    my own fault for being ignorant.  So I switched....to DiGi Smartplan.  I get unlimited internet, and just pay per call/sms 

Yes, DiGi flat call/sms rates are higher than Maxis, but LOOK CAREFULLY, DiGi rate is for ALL NETWORKS, Maxis lower rates is ONLY to Maxis numbers and Maxis only deduct to Maxis numbers from your monthly commitment amount, calling/sms to other telcos is extra charge, calling/sms to other networks cost HIGHER than DiGi's. Look carefully.

I made a simple comparison:

Maxis
Monthly commitment = RM50 - calls/sms to other telco you pay extra at a HIGHER rate.
Mobile internet = RM88 (3Gig) - exceed the limit you pay extra.
Total per month = RM138 (not including extras, which is confirm ada every month)

DiGi
Monthly commitment - RM68 (3Gig) - for REAL unlimited mobile internet, calls/sms - pay as you use.
Total per month = RMxx - surely less than RM100, based on my usage.
I am smart and I have a plan, so I use Smartplan

by the way, is it possible to transfer prepaid credit balance to postpaid

or digi/umobile? have not survey... need help on this 1

or just ask them use viber(free call = LOL)