A word of caution, if you have purchased or unlocked PTCL Charji device and using any other network SIM on it, please make surenot to accept the notification for updating the firmware, otherwise your device will be locked again.

And the most important thing, you will not be able to unlock the device again (so far no option available). What this update does, is to update your device firmware and the latest firmware is networksignedand the counter of unlocking device is set to 10.What does this mean? Well in short, you have 10 time options to put the unlock code, and if you use wrong codes 10 times the device will be permanently locked. What PTCL does in this update is to utilize all the available slots and set it to 10, so you have 0 time left to place the unlock code.
You will not be able to unlock the device using dc-unlocker as well.