[Q] My Note N7000 does not recognize sim.

Hi,

Recently I have bought a used N7000.
While selling the phone, the guy said its locked and unfortunately I did not have a sim card to verify whether it was locked or messed up.

Now after some days when I tried putting a simcard then I realized that It did not recognize the sim card nor asked for the unlock code.
So I guess it is messed up and not locked.

So below it the problem stated:
When I insert a sim card into it, it does not recognize and I see a circle slashed through it.
In details(about phone) I see Network as Unknown.

then I wanted to know if the phone was rooted so checked with root checker. The phone is not rooted.

It running on 4.0.4.

I have done some research on it, but could not find a satisfying solution for it.

I am not very familier with technical knowledge in terms of android.
Prior to it I have just rooted a HTC explorer and installed cw10 into it.


Seeking a help from any of you. I dont want to brick this phone.

Thanks in advance