Now, our Lumia 640 with Windows 10 Mobile Build 14267 is facing a major bug. When we turn on the device, it is actually freezing when try to turn on the mobile data toggle from Action center. The issue happens every time on our Lumia 640. However, the workaround to resolve the issue till next reboot is trying to do a soft reset until the freezing issue solves. You can watch the video to see the major bug in action:
However, the fix is temporary and Microsoft needs to squash the bug as soon as possible. It is worth to mention, the issue is not happening on Lumia which are in supported list and along with Lumia 640 XL (unsupported with Redstone Build). It seems the issue is hitting to very few Lumia devices or just Lumia 640 variants. We don’t advise any of our readers to install new build on their Lumia 640. As our Lumia 640 has become totally unusable.
If you are having any doubts, Please tell us in comments below: