https://support.garmin.com/en-HK/?faq=1l3LKD6Ysx6DF5fLpWdkP7
Master reset for a GPSMAP 192c/198c | Garmin Customer Support
Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.
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https://support.garmin.com/en-IN/?faq=9fxRmbLeP29b9hDETFpzYA
Transfer user data from MapSource to a GPSMAP 192c or 198c series device | Garmin Customer Support
Garmin India Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.