help!!

[raaj13]

halo. am new to windows devices.
I m using samsung omnia sgh-i900. my phone version being shown as
pda: sgh - i900DDH4/DDH5
phone: sgh - i900DDH4.
Do need to upgrade?? can windows6.5 be installed on my device as I see many roms here??please help. looking forward for your advice . if I need upgrade where can I find it . Am from india will this make any change .
your tweaks were nice I can feel them working. Also m usig xscalar cpu bt I see only speed till 500 mhz. where as I thnk the cpu is 640mhz am I running an old version???
also my windows updater is showing cannot establish connetion whereas I have unlimited data plan is it my network problem or my windows??.
thanks in advance if u can help