I do beleive it is systemic for the 8830 and it does not seem to matter which carrier the phone is using. *18 does fix it for me but it fails again with an hour or less sometimes. It will also come back on it's own sometimes and do that multiple times per hour depending on how far I am from a cell tower.

Sprint told me it isnt their issue! I told them if it happens to their customer (me) it certainly *is* their issue. They said please call Rim.

I have not called Rim yet......