Yeah i'm no spring chicken either.

So it might depend on your system, it seems. I have a motorola phone, and it's awful old so it's nothing to compare with new ones (though it is the toughest phone [works after being dropped off a one storey balcony onto concrete], it isn't the smartest), and when travelling I have lost out on many players. But my hubby has a whiz bam new phone, Galaxy whatever and has occasional drops on it too, and wont trust it to buy players on.
All our home internet is through the same router and all wifi. The one computer has a shell overlaid that touch thingy windows, is the fastest system, made for gaming, that's the one we can bid to last second on. My laptop and older computer are Win 7 and both slower, so we don't use them for auctions.