Hi! I understand your Android phone was syncing fine with your Epson ET-4850 using the Epson Smart Panel app until a recent update caused connection issues. Let’s work together to get that fixed.

First, can you tell me if the Epson Smart Panel app on your phone is fully up to date? Sometimes after a printer or phone update, the app might need an update to keep things running smoothly.

Meanwhile, here’s a step-by-step approach to troubleshoot this:

1. Restart Devices: Turn off your ET-4850 printer, wait about 10 seconds, then turn it back on. Also, restart your Android phone. This can refresh network connections.

2. Check Printer Wi-Fi Connection: On the printer, ensure it’s connected properly to your Wi-Fi network. You can check the Wi-Fi status on the printer control panel.

3. Confirm Same Network: Make sure your Android phone is connected to the same Wi-Fi network as your printer, since connection issues often come from network mismatches.

4. Reset Connection in Epson Smart Panel App:
- Open the Epson Smart Panel app on your Android phone.
- Tap the [+] icon at the top of the screen to add or reset your printer connection.
- Select your ET-4850 printer and follow the prompts to reconnect.

5. Clear App Cache (Android Specific):
- Go to Settings > Apps > Epson Smart Panel.
- Tap “Storage” and then “Clear cache.”
- Restart the app and try reconnecting.

6. Check for Firmware Updates: Ensure your ET-4850 printer’s firmware is up to date. You can do this via Epson’s support website or the Epson Software Updater tool.

If you’ve already tried some of these, let me know which ones so I can guide you to the next steps. Also, does your phone show any specific error messages when attempting to connect?

This approach often resolves recent update connection hiccups, but if it persists, we can look deeper into network settings or app reinstall options.

Are you able to try these steps and tell me how it goes?