If you are unable to use the VoLTE (Voice over LTE) calling feature on your REDMI 10 5G, please refer to the following troubleshooting steps:
1. Ensure that your phone's operating system is up-to-date. Software updates often include bug fixes, security patches, and improvements that can address software-level issues.
2. Please note that VoLTE requires that the smartphones on both sides of the call are supported and turned on.
3. Ensure that you are in an area with 4G network coverage. Sometimes, you may not get a 4G signal in certain locations.
4. For MIUI version: Please go to [Phone] >> navigate to dial >> enter * # * #86583# * # *. Then check if VoLTE is enabled by going to [Settings] >> [SIM cards & mobile networks] >> choose your SIM card >> turn on [Use VoLTE].
For Xiaomi HyperOS version: Please go to [Phone] >> navigate to dial >> enter * # * #86583# * # *. Then check if VoLTE is enabled by going to [Settings] >> [Mobile networks] >> choose your SIM card >> turn on [Use VoLTE].
5. Ensure your smartphone prioritizes using 4G or LTE network type, which is necessary for VoLTE.
For MIUI version: You can go to [Settings] >> [SIM cards & mobile networks] >> choose your SIM card >> [Preferred network type] >> [Prefer LTE].
For Xiaomi HyperOS version: You can go to [Settings] >> [Mobile networks] >> choose your SIM card >> [Preferred network type] >> [Prefer LTE].
6. If possible, try using another VoLTE-enabled device with your SIM card or use your smartphone with another VoLTE-enabled SIM card. This can help determine whether the issue lies with the smartphone or the carrier.
7. You can reset network settings.
For MIUI version: Open [Settings] >> [Connection & sharing] >> [Reset Wi-Fi, mobile networks, and Bluetooth] >> [Reset settings] >> [OK]. Afterward, reconfigure your network settings and check if VoLTE is now functional.
For Xiaomi HyperOS version: Open [Settings] >> [More connectivity options] >> [Reset Wi-Fi, mobile networks, and Bluetooth] >> [Reset settings] >> [OK]. Afterward, reconfigure your network settings and check if VoLTE is now functional.
8. A simple restart can sometimes resolve temporary glitches. Restart your Xiaomi smartphone and check if the VoLTE feature is working afterward.
9. If the issue persists, you can consider performing a factory reset. This will erase all data on your phone, so make sure to back up the data, log out your Xiaomi and Google accounts, and perform a factory reset.
We hope the above information is helpful. If the issue still occurs, we hope you could submit user feedback by going to [Settings] >> [Services & feedback], and wait for the future updates.