Never Have Used A Hot Air Repair Station

The crack really isn't very noticeable. If you hold it in the light a certain way it can definitely be seen. But tip the phone a bit the other way and its invisible. I used it for at least a year or more after it cracked with no issues whatsoever. I would be tempted to just use it as is without going to the bother of swapping screens.

I hope this Canadian phone locked to Rogers can work in Mexico. It will have to be unlocked but that's easy to do.