Been reading this post to solve the same issue and I stumbled on a solution to fix Smart Connect in the downloaded app from Google. Search for Smart Connect in the Settings Menu and bring up the App Info. Scroll down to Advanced and tick Yes to Modify system settings. Close down the Smart Connect app. Reboot the phone. Reopen Smart Connect and you should find the Wi-Fi hotpsot and other settings such as Brightness. Worked for me.
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