I have been using Socialife with Sony Entertainment Network (SEN) account as my "Sign-in ID." However, my device is not compatible with signing in to Socialife with SEN account. How can I use Socialife with the device as keeping my settings and registration?

A210 You can use your settings and registration of Socialife with your Sony Entertainment Network (SEN) account only with the supported devices. Check supported devices.
You have to remove your existing account of Socialife which is created with your SEN account, and create new one with Facebook (or VKontakte) account. How to remove your account of Socialife.
In this case, you need to set up Socialife from the scratch as all the settings will be initialized.