Chosen Solution

It doesnt have carrier lock, already tried resetting the network,

There can be multiple reasons that causes this on the 6 series. You can rule out the baseband by inputting *#06# into the keypad and see if it brings up your IMEI number if it doesn’t you have a baseband problem that would be more than the phone is worth to fix as it would need to be sent to an experienced repairer that still offers this service.