I switched from prepaid to postpaid(sub line) - Maxis user
Why?
1) cheaper - on prepaid, i have to top up every month RM30 but i couldn't finish it. Eventually, it will cumulate to a few hundred ringgit
2) unlimited usage provided that u're willing to pay - this comes in handy when u realize that u save the hastle of buying top ups especially when u're out of credits during 'emergencies'
3) pride - not the best reason for switching plans but it definitely sounds cooler when u say that u're using postpaid =D