I often find myself a little north of Camp Morton. I noticed last year early in the season, before the trees had leafs, that we finally had marginal service when we had none before. That said it could worse and almost disappeared as the trees gained their leafs. I suspect you have similar issues in Winnipeg Beach. The cell towers operate on a line of sight principle. If you can't see it you have some level of obstruction between you and the tower. The further from the tower you are the worse your coverage gets.
If you email email@example.com with details of your location and your account information they can look into the specifics of your situation in more detail and give you information matched to what is happening.
As you may know from reading in the previous posts on this topic that I have one cell phone with MTS and another cell phone I use as a work phone on the network partner (Rogers) anyways the data speeds in this area are still slow and unusable when 3G is only available and with addressing my concerns on this with MTS its kind of been "oh well it is what it is" and with addressing the same concerns to the network partner with my work phone they have acknowledged the tower is overwhelmed with people in the area so they offered me $5 off my plan for a year and say after a year if still no improvements they can look at offering me something else. I didn't even have to ask they just asked me if that would be an OK offer. MTS has never offered me anything just been saying "wireless service is not guaranteed" and the network partner says "we promise to offer the best service to all our customers no madder where they are and when" this makes me want to cancel my personal phone with MTS and switch it to the network partner.
Aug 30: We are completing a network upgrade between 12:00 a.m. and 6:00 a.m., which may impact HSPA voice and data and LTE services for up to 30 minutes in Gimli, Stonewall, Teulon and Winnipeg Beach.