Ok, I asked the Starhub people they say if my plan is at least 21months already, I can then change phone. And the good thing is, my plan is already 22months old. So I will be changing my phone.
I have 3 choices, all Samsung, Ultra Edition 12.1, 12.9, 13.8, in which I can't decide what to buy so I let my mum choose for me. So now I am waiting for her return to see which phone she bought.
[EDITED ON 4.05PM]
Ok, my new phone is Samsung Ultra Edition 12.1 aka U-700. It's ok, but no in-built games or other java applications.