I'm sure they will....if you become deliquent with them. As far as I know no wireless phone provider will report the account to the CRA unless you stop paying your bill.
I've read that AT&T reports your good tradeline. I should have applied with them. Oh well I'm stuck with voicestream for a year. So far the service has been excellent, so I'm not upset. I just need another good tradeline.
Verizon Wireless in Former Airtouch Areas does to all 3 even if it's positive... can't speak to other former JV companies..