Dear Thanusak Umpat,
Thank you for order from us.
This kind case is flexible, Please follow the steps to install the case after you get it:
1.Remove the films on the back of the cover (there will be no scratches after you remove it);
2.Put the bumper on the cellphone first ( from left to right );
3.Then put the back cover on your cellphone,it will attach the buckle
Tips: Make sure no protector on the back of your cellphone, or it can't fit;
Any more problems, please contact us first.
Please Don't reply this message if you have no problem.
Yours