After updating their device to OxygenOS 11, users are unable to find the modem in the PDC tool or QPST as before. Along the same lines, some users are unable to connect to QPST / PDC on their OnePlus device running Android 11. Well, if you are also facing any of these issues, then you have come to the right place. In this guide, we will show you how to fix the issue of PDC not working on OnePlus devices running Android 11. So without further ado, let’s get started. If you have a rooted OnePlus device, then you could also refer to another method mentioned in our other guide (apart from the two that we have shared below): Fix PDC Not Working with Rooted OnePlus on Android 11.
METHOD 1: Fix PDC Not Working on OnePlus Android 11 via EFSTools
This is the more complicated of the two methods and a lengthier one as well. However, it comes with a high degree of success and hence is the recommended one. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.
STEP 1: Download the Required Files
To begin with, download all the required files from the below links [Credits: OnePlus Forum Member oppo001].
EFS ZIP FileMBN ZIP File CollectionsEfsTools 0.10 modded 1.2EfsTools 0.10 modded 1.1
EfsTools v1.2 is the newer one and supports activation of the 2nd SIM slot but is giving errors to some users. If that is the case with you as well, then consider using the v1.1 (however, it only supports activation of the 1st SIM slot).
STEP 2: Enable VoLTE/VoWiFi
Next up, you will have to enable the VoLTE and VoWiFi on your OnePlus device. This could be done with the help of the OnePlus Log Kit and the OnePlus Engineer Mode app. For that, you may refer to our comprehensive tutorial: How to Enable VoLTE and VoWiFi on any OnePlus Device. Once that is done, you should see the option to enable/disable VoLTE/VoWiFi under Settings > WiFi & Network > SIM & Network > SIM1 (and SIM2).
STEP 3: Verify the EFS Connection
STEP 4: Make VoLTE/VoWiFi work via EFS Tool
This was the first non-root method to fix the issue of PDC not working after updating your OnePlus device to Android 11. Let’s now make you aware of the second one.
METHOD 2: Fix PDC Not Working on OnePlus Android 11 via ADB Command
It is the shorter of the two methods and is easier to carry out as well. However, not everyone was able to achieve success via this method on their non-rooted device. Anyways, to try it out, here’s what you need to do [Credit: OnePlus Forum Member Poiz]. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.
STEP 1: Enable VoLTE/VoWiFi
To begin with, you will have to enable the VoLTE and VoWiFi on your OnePlus device. This could be done with the help of the OnePlus Log Kit and the OnePlus Engineer Mode app. To carry out this task, you could refer to our comprehensive tutorial: How to Enable VoLTE and VoWiFi on any OnePlus Device. Once that is done, you should see the option to enable/disable VoLTE/VoWiFi under Settings > WiFi & Network > SIM & Network > SIM1 (and SIM2).
STEP 2: Switch to Full Port
STEP 3: Enable USB Debugging
Head over to Settings > About Phone > Tap on Build Number 7 times > Go back to Settings > System > Advanced > Developer Options > Enable USB Debugging.
STEP 4: Reboot Device to FTM Mode
STEP 5: Fix PDC Android 11 Issue via ADB Commands
So with this, we round off the guide on how you could fix the issue of PDC not working after updating your OnePlus device to Android 11 (without root). We have shared two different methods for the same. Do let us know which one spelled out success for you. Likewise, if you have any queries concerning the aforementioned steps, drop them in the comments section below. We will get back to you with a solution at the earliest.
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