I remember back in the day of the Sony Satio U1, the last Symbian v5 phone, the software was horrendous(screen tearing, random OS freezes) and later, the phone

I remember back in the day of the Sony Satio U1, the last Symbian v5 phone, the software was horrendous(screen tearing, random OS freezes) and later, the phone abandoned. I think it was afterwards that Sony and Ericsson split?