I visited the Telus web site last week for other reasons and got the following geo-targeted page for MB in preparation for some MTS wireless customers being transferred to Telus.
TELUS welcomes MTS customers to the family.
As an MTS customer, will I have to change my plan? How would this impact my services?
We know this is a big change for MTS customers. We want to make the transition to TELUS as easy and seamless as possible, without disrupting your existing products or services. You’ll pay the same price for a plan that is the same or better than your current MTS plan. Plus, you can keep your same phone number.
Selected MTS customers will be notified by mail that they are moving to TELUS, and will be provided with detailed information to complete the move. Until the transition, your service and rate plan will remain the same with Bell MTS.
This isn't mentioned in the FAQ, but Bell & Telus share cell towers, so coverage will be the same or better for both MTS and Telus customers.
I already noticed the improvement on the weekend when I was talking to someone who has a Telus cell phone. The voice quality has always been overly compressed, but yesterday they must have been on an MTS tower because the quality was almost indistinguishable from land-line quality.