Iristel Inc.’s mobile virtual network operator (MVNO) Sugar Mobile announced Wednesday it has partnered with an American WiFi-based service to leverage existing WiFi customers who might want some access to cellular networks. Canadians who use TextPlus Inc.’s Nextplus app for free texting and calling over WiFi can get a 50-per-cent discount on a Sugar Mobile starter kit and first month of service, the companies said in a press release. Sugar Mobile, while predominantly a WiFi-based service, allows users access to Iristel’s and Rogers Communications...