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Hello! I need help
I forgot my pin pattern and i want to open my phone.. how can i regain it?
Hi @Nikaki12, I am sorry to hear about this. 
If you have forgotten your lock screen PIN you will need to perform a software repair using Xperia Companion. Please make sure you know you Google username and password as you will need these to get back in to your phone.
Not sure if it'll help but check this out
/t5/FAQ/How-to-perform-a-software-repair-with-Xperia-Companion/td-p/1103057