Hi,Need some advice please.. Just took my phone as screen going black every now and then. Just took it to a service centre and can it be fixed. I need screen replacement but was told if I didn't give him my password for my phone I would lose all data...

Since my last update maybe a week or so ago my apps are opening automatically? So I have no choice but to reply for example WhatsApp messages etc. Can anyone give my any suggestions as to why this is happening or can it be resolved. Thanks Paula