you need Entry in Sys.txt
================
[gps]
location_net=1
location_gps=1
background_navigation=1
skip_announce_errors=1
accuracy_workaround=0
if TTS grey, then you have no TTS voice (to choose from) . IMO a Problem with System->TTS-Engine (Samsung, Vocalizer,Loquendo...). check Language & input -> Text-to-Speech-Output
here is the TTSEngine visible with voice example.
If Test ok, then TTS-Voice can also be selected in the Menu if installed
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