The Sprint 4G unit is 2 months old so it's up to date. I took it into the Sprint service center and they verified it was working correctly and up to date. They also tried to connect the Aspire to it but could not, so they gave up. I'm about to give up as well. I thought I'd try this forum as a last resort.
My Toshiba Notebook is the only other device connected to the sprint 4G hotspot unit.
I've tried to connect the Acer only to the Sprint 4G but the results are the same -- no real connection despite is saying it is connected with a strong signal. I suspose it is hopeless if Sprint couldn't get it to work with their 4G wifi unit. BTW, when I was at the Sprint service center, my aspire connected to the Star Buck wifi that was next door ok and worked fine. I just cannot get it to connect to the Sprint 4G wifi and neither can Sprint!! :-(