Share your experience!
What is the back of the phone made of, not the aluminium sides.
Hi @Eddington-007,
The back of an Xperia XA1 is made out of plastic and if you are wondering about the glass on the front its Gorilla 4! 
I hope that answers your question!
Hi, I have an Xperia XA1 Black model which I'm very happy with. My only small issue is when i removed the small sticker at the back (which tells you how to insert sim & sd card) left a mark where the sticker was. Can you help me how to clean the residue please?
Hi @Dimitrius787, welcome to our forum!
Have you been able to remove the mark where the sticker was placed on the back of your phone? If you haven't, you can try and use a dry cloth on the back of your phone to try and wipe the mark away.
Do note that the back is made out of plastic!
Let me know how it goes!
Hi, yes i did manage to remove it!
Happy with my Xperia XA1.. Only downside that sometimes apps crashes maybe it will become better with Oreo ! (hope it will be soon 🤗)
Hi again and I'm glad to hear that you were able to solve it! 
Do you still experience the behaviour with the application now if you have received the Android Oreo update? If you do, please let me know!