I've done it but another problem here
Thanks hurry_hui for trying it out but a friend of mine has helped me out with it.
Now the problem is I've been able to connect Nokia 5300 as a modem and I've dialedthe internet number. My phone is showing that it has connected to the internet but when I am starting Firefox , I cannot browse the net. Firefox is showing that " Firefox is Offline".
I had tried the system update to directly link to the internet but that also failed showing that there is no network connection.
But all along the phone shows that I am connected to the internet.
Please try this peculiar problem.