: Ensure your certificate profile is set as the "Default" in Certificate Manager before attempting the installation.

Note down the of your watch (found in Wi-Fi settings under your connected network). Restart your watch to apply developer settings. 2. Connect via Tizen Device Manager Open Device Manager within Tizen Studio on your PC.

Sign in with your Samsung account if prompted. This step is critical; without a valid certificate, the TPK will fail to install. In the Device Manager , right-click on your connected watch. Select Install App . Browse and select the WhatsApp(World Technique).tpk file.

Wait for the "Success" notification. The app should now appear in your watch's app drawer.