You can set the redial option whenever it disconnects...I think with 3G connections,come diconnection problems too..
I think it has to do with no of ppl in the network accessing...If more ppl are downloading then it might lead to disconnection to some other users..Also it might be their strategy to auto disconnect after specific data download limits ,so that they limit the UL downloads..
---------- Post added at 01:16 PM ---------- Previous post was at 01:14 PM ----------
I dont find this a problem at all as I have set the redial option.I download normally 11Gb from 12 to 8 in the early mornings at speeds of 400KBps.....