available at offline New Delhi cannaught palace exclusive store
Once the Simcard removed and then plugged in again?
At least once changed from Sim 1 to Sim 2 or vice versa?
The version depends on your phone (OnePlus 7 or OnePlus 7 Pro). It seems yours is on 9.5.6 cause that's the latest for 7.
It's been a month since I got it and till now I haven't noticed a single "ghost touch"! The device is great and I can finish every task on the go....