My young company is growing -- we'll soon have a live site to be monitored.
In the past, I've always had a phone or two that was passed around to whoever was on call.. Nagios sends its emails there, staff have the number, etc. I've used Blackberry Curves, which were great at email, but not so hot for remote administration.
I'm considering iPhones, Blackberries and HTC/Google phones. I'm located in Canada, and would likely go with Rogers (no flame wars here please.. in my specific area they are the least worst, in my experience).
What do you guys use/recommend for an on call phone?