I'm thinking of trying TM but I'd like to know if there's a tower nearby. Always have problems with cell signal in my area. How can I find out? I've learned not to trust coverage maps.
Have a look in the area for the towers. On the yard next to the tower there is usually some sign indicating who uses the tower. Each provider has their own cabinet/container.
Best option is to get a pre-paid TM SIM and give it a test.