I'm using sierra wireless 881 with at&t.why do i have to reboot it often?

Question

additional info inquiry:also its been getting physically hot why is that ?another question is : why does it switch from 3g 2 bars (which is very fast) to 4 & 5 bars without the 3g.it goes back and forth and i usually have to reboot when it does?i'd appreciate any info about these issues. thanks in advance.oh yea im using this with new hp laptop 4 gig

Answer 1

1) It gets physically hot because radio transmitters - especially at those frequencies - do.  Just make sure it has plenty of air on all sides to keep it as cool as possible.

2) It keeps switching because the signal is marginal, or because there's periodic interference.  Move to another location.  Even a couple of feet can make a difference.  (The indicator isn't signal level, it's signal quality, and plain old cellular is a better connection for a given signal than 3G.)