BTW, did they ever sort out the quality issues with the 4a and 4a 5G? I'm super happy with my 3a XL but the non-expandable 64 GB of space is rather limiting.
My housemate's had a 4a since launch and I've been using a 4a 5G since November, neither have had any issues thus far. I dunno if it would be worth upgrading from a 3a XL, but it seems like the issues have been fixed since last month, at least according to a quick google search.