Good day!
I understand that you are facing an issue with the Wi-Fi on your Oppo A37f. It can be frustrating when basic troubleshooting and phone reset do not resolve the problem. Here are a few more troubleshooting steps you can try:
1. Restart your router: Sometimes, the issue lies with the router rather than the phone. Try restarting your router by unplugging it from the power source, waiting for a few seconds, and plugging it back in. This can help resolve any temporary network issues.
2. Forget and reconnect to the Wi-Fi network: On your Oppo A37f, go to Settings > Wi-Fi. Find your Wi-Fi network in the list and long-press on it. Then, select "Forget network" and try reconnecting to it again by entering the Wi-Fi password.
3. Reset network settings: Go to Settings > Additional settings > Backup & reset > Network settings reset. This will reset all network-related settings on your phone, including Wi-Fi, Bluetooth, and mobile data settings. Note that you will have to reconnect to Wi-Fi networks and re-pair Bluetooth devices afterward.
4. Update phone software: Ensure that your Oppo A37f has the latest software update installed. Sometimes, software updates include bug fixes and improvements that can resolve Wi-Fi issues. Go to Settings > Software Updates to check for any available updates.
If none of the above steps work, it is recommended to contact Oppo customer support or visit an authorized service center for further assistance. They will be able to diagnose the issue more accurately and provide a solution.
I hope this helps! Let me know if you have any further questions.