Hi,
please access your device's preferences menu and flip through the pages until you get an option called something like change maps. There you should be able to select your new map. Activate that new map and after reaching SA you'll be able to navigate with that map. You'll always only be able to navigate on that map that is active and if you're in a country being covered by that map.
Regards
Lars.
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TT XL•S LIVE IQ Routes Edition (Text-to-Speech) | TT Start 60
map/Europe_North 875.3613 | map/Europe 905.4787
TT Home 2.9.5.3093 | MyTT SA 3.2.0.699
Navcore 9.510 | Navcore 12.055
Win7 32bit Professional
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I'm no TT employee but just a customer trying to help