Calls don't come through while on GPRS.

[dyntak]

I don't recall having this issue on any of my other phones, but I unintentially missed quite few important calls while using GPRS.

Is it supposed to be like this?

[Rudegar]

no sms and calls are suppose to disable grps unless they are finshed

[dyntak]

wow, that was a quick response.

So, how do I fix this?

[Vampire_Dracula]

You can not fix it.
Interrupting a GPRS session to accept a voice call is a feature that some operators have chosen not to implement.