hii am on bsnl 2g prepaid ryt now. have ported into bsnl from idea three weeks back.the thing is i want to migrate to 3g through a physciall connection. i.e migrate from 2g to 3g by taking a Usim having higher memory (the no. being same)can that be possible??also if it is can the balance and validity that i have right now (1yr left)...would that be carried forward to the new Usim card that i will get. and the call rates will be the same i.e 49p/mtried to talk to bsnl cc 1503 but they cant get me exactly.