Well - try as I might to locate a "minimum equipment standards" document I stumbled onto on the web months ago I cannot find it(never book marked it), but some of this was in that doc. I was going to reference it but can not locate it again.
That's all well and good for line-of-duty usage, which is along the lines of what DSYCUTTER mentioned. But the OP said nothing about this, and even if he/she were interested in using the pager on the job then it would be inappropriate for radio shops or programmers to police this issue. (Again, transmitters are a different situation.)
Regarding page loading problems, I believe one of the image servers is having problems possibly due to weather in its region.