Bell Canada wireless networks are down across Canada for reasons yet unknown.

Cellphone customers who use Bell wireless services have lost service. Also, subscribers to Telus and Koodoo, who buy network services from Bell Canada.

See Bell's Network Outage Map for more details.

http://canadianoutages.com/status/bell/map/

UPDATE: Bell is working to restore services. According to CTV, Telus is reporting the cause of the network outage is due to a cut in Bell fibre line.