I got a sandisk 1 gb in my mobile ....7610.
I have no problems of hangin or phone slowin down................all u hear is crap !!!
the phone does take about 1 or 1.5 seconds more for a 1gb rs mmc than a 64 mb card to scan the files when u open em thru file manager.....................but believe me u'll not even notice it.
A 1 gb card will always leave u wanting more !!!
Now I am lookin for a 2 gb card for my 7610 , i dnt know if it even exists but i saw an ad in ebay or sumthin ..................if anybody knows abt it plz PM me.
I got my card for 74 $ on buy.com
I dnt know if they ship to india , but if they do ......................get one !!!