For normal use, it all come down to call rate. If time or italk is cheaper then better use that one coz no need to configure anything. But usually voip is cheaper especially call to oversea.

Voip also got some advantages/disadvantage. 1st the quality really depend on ur internet line. 2nd you can have DID no like 03xxxxxxxx to connect to ur voip account. So people can call you anywhere you are with 1 phone no. Imagine you in USA and logging to your voip account. People dialing 03xxxxxxx still can connect to you. You can also configure voip to forward to other no. Even ring multiple no at once. Let's said you not around, the server will forward the call to multiple no you configured and connect to the 1st one that pickup the call.

The are many thing, but it you only using to make a call then just use whatever cheaper.

To use voip. Need ATA device, usually coz RM200+. Connect this to RJ45 port and normal phone. Then need to configure the account info.

Yes, need to subscribe to like Jaring 015 or BBPhone. Local server better in latency (delay). But they got monthly fee I believe. Try oversea provider, usually only pay as you use for basic call. If need DID then got monthly fee. That the basic one.

Hmm, another interesting about voip is free call. If 2 party got both voip with same provider then you can call for free. If you own a bussines and got multiple branch. You can configure voip and can call free between those branches.

So many thing to story.. If need anything just drop a msg here..