Lake Falcon Mapping Chip

I am in the market for a new GPS (and sonar) unit, and am wondering what units to consider based on Lake Falcon detail. If I remember correctly, some mapping chips show detail on the Texas side, but not on the Mexican side. What is the latest and greatest unit that shows ALL of Lake Falcon's contours, both sides, and what is the chip or card to buy to put in it? Thanks

i have a buddy that bought new garmins and there are no lines on the Mexico side of falcon. I have navionics for both hummingbird and Lowrance and they're fine

Navionics Platinum in a Humminbirds: good all over Falcon.

thanks

You can use Navionics Webapp to view Lake Falcon or any lake:
https://webapp.navionics.com/?lang=en