To enable VoLTE on Xiaomi, dial *#*#86583#*#* in your Phone app, then toggle on “Make calls using VoLTE” in your SIM settings. This hidden code disables the carrier check, instantly unlocking the VoLTE option that most Xiaomi models hide by default.
Why you urgently need to enable VoLTE on your Xiaomi
3G networks are being switched off worldwide, and if your Xiaomi doesn’t have VoLTE activated, you’ll lose the ability to make calls once that shutdown reaches your region. VoLTE (Voice over LTE) allows your phone to make calls over the 4G network, offering clearer call quality, faster connection times, and no slowdowns to mobile data during calls. Without it, you’ll be stuck on a dying 3G signal, experiencing dropped calls, long dial times, and no internet while talking. With 3G networks being phased out in many regions, enabling VoLTE is crucial to ensure you can continue to make and receive calls, including emergency calls. The steps below take under two minutes and permanently secure your calling future.
Step 1: Dial the secret VoLTE unlock code
Open the Phone app on your Xiaomi, the same app you use to dial numbers. Tap the keypad and enter exactly: *#*#86583#*#*. After entering the code, a pop-up message stating “VoLTE carrier check disabled” should appear at the bottom of your screen, which unlocks the VoLTE option in your device settings. This code bypasses Xiaomi’s regional carrier restriction, which is the #1 reason VoLTE settings stay hidden on otherwise capable phones. If you don’t see the pop-up, double-check that you typed all 12 characters correctly, the code starts and ends with an asterisk.
Step 2: Update your Xiaomi software for VoLTE fixes
Outdated software often breaks VoLTE, even after the code is entered. Go to Settings > About Phone > System Update and tap “Check for updates.” If any update is available, download and install it, this ensures your phone has the latest carrier profiles and bug fixes that make VoLTE stable. Xiaomi frequently pushes patches specifically for VoLTE handover and call quality, so skipping this step might leave you with a working toggle but broken calls. After updating, your phone may restart automatically; that’s normal.
Step 3: Set your network preference to 4G/LTE
Navigate to Settings > SIM cards & mobile networks > [Select your SIM] > Preferred network type. Choose “Prefer LTE” or “4G/LTE preferred” from the list. This tells your Xiaomi to stay locked onto 4G instead of dropping to 3G for calls, which is exactly what VoLTE needs to function. For dual-SIM users, repeat this step for each SIM card you plan to use for calls.
Step 4: Toggle the VoLTE setting on your SIM card
Still in Settings > SIM cards & mobile networks, tap on your active SIM (e.g., “SIM 1” or your carrier’s name). Scroll down and you’ll now see a new option that was hidden before the code: “Make calls using VoLTE” (sometimes labeled just “VoLTE” or “VoLTE calls”). Flip the switch to ON. If the option is greyed out, go back and re-dial the code, it might have been reset by a software update.
Step 5: Restart and test your VoLTE connection
Press and hold the power button, then tap Restart. This applies all the network changes cleanly, a simple reboot fixes 90% of VoLTE activation issues. After the phone boots back up, make a test call to a friend or your voicemail. If the icon disappears and data slows down, repeat steps 1-4 and restart again.
What to do if VoLTE still won't work on your Xiaomi
If the “Make calls using VoLTE” toggle never appears even after dialing the code, first re-enter *#*#86583#*#* and confirm the pop-up shows again, sometimes a system update silently re-enables the carrier check. If that fails, check whether your carrier actually supports VoLTE on your specific Xiaomi model; some smaller carriers block unofficial devices. Very old non-EU models (like the Redmi Note 4 or Mi A1) may never support VoLTE due to missing hardware bands or outdated modem firmware, in that case, no code or setting will fix it. Finally, be aware that dialing the code again can disable VoLTE to fix rare SMS bugs, if you ever experience delayed or missing texts after enabling VoLTE, re-dial the code to turn off the feature and contact your carrier for a manual provisioning update. If you need to move files or use accessories, see these easy steps to connect external devices.
