Vivo y11 secret codes may vary depending on the specific model and software version. However, here are some common secret codes that work on many Vivo devices, including the Vivo Y11:

1. *#06#: This code displays the IMEI (International Mobile Equipment Identity) number of your device, which is a unique identifier for your phone.
2. ##4636##: This code opens the tasting menu, where you can access various information about your device, including battery status, Wi-Fi information, and more.
3. ##225##: This code checks the call forwarding status on your device.
4. ##7780##: This code performs a factory reset on your device, restoring it to its original settings. Note that this will erase all your data, so be sure to back up your important information before using this code.
5. ##34971539##: This code provides information about the camera on your device, such as sensor details, firmware version, and more.

Please note that these Vivo y11 secret codes are provided for informational purposes only. Some codes may not work on all Vivo Y11 devices or may have different functions depending on the device’s software version. It’s always a good idea to exercise caution when using these codes, as they can potentially affect your device’s settings or data.