So I will be travelling to London and subsequently Singapore next month. My 3G is JB with Blackrain. Is there any way around the tethered issue when my battery runs out? For example: 1) Could I use a computer in London to run BR? 2) Someone mentioned that they used a wall charger and did not have to run BR afterwards. Any others try this? And if I use a wall charger, is there any issues with the voltage? My iPod is from Canada, but I am using the USB on my computer here in Hong Kong to charge it now and there seems to be no problem but not sure if the case would be the same with the wall charger here or in London. Any comments? Thanks in advance!