Xperia Z1 network weak signal

[m3asmi]

My Xperia Z1 screen's has being crashed

I replace it with a new one now the network signal not stable with my SIM

I flashed it with lollipop the problem doesn't solved !!!

any idea what to do ?

[Qatrium]

If you already tried another SIM card and it works well, then the problem might be in the SIM card, or this operator coverage. Try contacting your network operator and ask for SIM replacement.

[Hampus]

Hi,

I agree with Quester since it works fine with another SIM-card. Have you tried your SIM-card in another phone?

[m3asmi]

it worked just for a couples of minutes

then the signal is the same for all SIM cards

I asked a technician he told me that there is a circuit must be replaced