Xperia z3+ dual second sim problem

[kiikooo]

Hey guys,

I just purchased a Xperia Z3+ dual and the first time I turned it on with both sim cards it was working fine. 

Then for some reason the second sim stopped working on the 2G gsm network. I factory restored the phone and it worked again.

The thing is that yesterday as soon as I activated the Find my xperia service the 2nd sim stopped working again.

This is very annoying and renders my Z3 useless.

Anyone have an idea as to what is causing this?

Thanks,

Kiko

[Phy]

Does it work while on safe mode? 

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

[kiikooo]

I rebooted into safe mode and it did work. Then WiFi connected and it stopped again

.

Also just to mention this happens when second Sim is trying to connect to a 2G GSM network while the first is on LTE. 

[Phy]

If it works on safe mode then it indicates that a third party app is creating this issue.

[kiikooo]

But it still stopped working in safemode.

Also without installing anything after factory restoring the phone it still stops.

[Uliwooly]

@kiikooo

If I recall its not active SIM. 

[kiikooo]

But why does it work then stop. I managed to keep it working for a week then yesterday when I activated find my xperia it stopped. @uliwoolu