I update my z1 to 5.0.2 recently
During the update , the current sim card network used was STC (Sim Card 1)
I discovered problem when to change to other sim card (Sim Card 2) yesterday.
It stated sim card not detected
But when i put original sim card (Sim Card 1), its working normally.
Then for cross checked . i try to use (Sim card 2) to other phone, its working.
To cross check again , i use other sim card (Sim card 3) to the Z1, and it still detected same problem.
What happen actually. Why the Z1 does only reading the Sim Card 1?
Is it something to do with the latest android?
Please advised step to be taken.
