If you can still access recovery, turn off the phone and hold Power + Volume Up until the Android logo appears. Use the menu to select "wipe data/factory reset" .
A green circle or "Download OK" message will appear once finished. Disconnect and boot the phone. Troubleshooting & Recovery
Searching for "skachat proshivku Explay Rio " usually refers to finding and installing the official stock ROM for the Explay Rio