Originally Posted by BBAdmin
If EDGE is availble your device will switch to it. My BlackBerry jumps on to EDGE now again and will stay on it for sometimes as short as a few seconds before dropping back to GPRS - the most it has stayed in EDGE for (that I've noticed) has been about 20 minutes, although the average I've seen on mine has been maybe a couple of minutes. Right now it's on GPRS but 5 minutes ago it was EDGE.
Same here, longest I've got is around 20-30 mins too, I got EDGE in Fulham, City (Liverpool street and Algate), South Kensington and on my way to Croydon..