Head on to this thread.
There is a solution using the cello-tape like in the image attached below.
This one also did not work. Even SIM management is disable, when you go to settings (SIM management).
Three days ago i try to install CLOCKWORKMOD using an app called [ROOT] Rashr- Flash Tool from play store.
after installation the network disabled and even i try to reboot in to recovery mod, but it failed to, it just restart the phone.