Finally got Sprint data roaming working in Canada
 

I finally got data roaming to work in Canada on my Sprint Mogul following instructions from frazell to select "Never ask" and "Allow roaming" in the Phone's Roaming/"Data roam guard" settings. I still get a roaming warning before my phone connects to fetch email.

Previously I'd tried the "Default", "Always ask", and even "Never ask" but perhaps without checking "Allow roaming". I always got the error message "Cannot connect for an unknown reason".

I understand data roaming costs $.002/KB.

Re: Finally got Sprint data roaming working in Canada
 

Glad I could help :)

If Sprint still offers it they have an unlimited roaming add-on for around $40 a month. Since it is an add-on you can add it for the days you need it and drop it for the days you don't.

I can't remember the break-even point, but it was probably in the $2.50 range.