Share your experience!
I bought this phone as a gift and seams like the screen doesn't work properly. It's factory fault?
You should try posting in the L1 forum.
Hi @Mambablack
I've moved your post into the relevent forum area.
Your issue looks like some kind of GPU gkitch, you can try fixing by performing a backup using Xperia Companion followed by a software repair using Xperia Companion.
If the issue still is present after doing this, contact your Local support for a device repair evaluation.