unblocking network connection

[2K]

 Help my sonyn xperia Z2 working alright during the weekend, on monday start saying i have no network service with a yellow sign on the top left. please help

[BeadyEye]

Have you tried checking the apn settings on the phone? If that doesn't work, try to repair the software via pc companion.

[Thommo]

Contact your network as it maybe a problem with them or your sim card is dirty or simply may need to be replaced