BCE Inc. and Manitoba Telecom Services Inc. made a high-profile overture Friday in their bid to join forces, announcing plans for a proposed merged operation to fill gaps in wireless coverage along a major north-south highway in the prairie province. The two companies, which announced earlier this month they had struck a deal for Bell to purchase MTS for $3.9 billion, said in a press release the acquisition would include an investment to “ensure continuous broadband wireless coverage along Highway 75, Manitoba’s main transportation corridor linking...