SAMSUNG GALAXY S4 GT-I9505 version not registred on network

[Andr33iy98]

Hi,
My s4 gone wild, he did see my sim, sometimes can let me acces my connection setting to get automatically gsm-cell, sometimes shows me some dialog boxes, like in the pictures. Motherboard is unlocked, never locked, I dunnot why is happening this, It has Imei and is valid all the time. At the first time when I reboot phone it shows my network operator, but dissappear instantly after 2 seconds. Also, sometimes when I search automated networks is connecting and all is ok until I restart the phone.

[medmine]

try to change antene