Sony Xperia XZ Premium strange square in back cover, as marked in the picture, i tried to capture it in the mirror but the square didn't appear : r/SonyXperia
Spigen Ultra Hybrid Case for Sony Xperia XZ Premium
Cruzerlite Defense Fusion Fender Case for Xperia XZ Premium SO-04J | スマートフォン・携帯電話,NTTドコモ,Xperia XZ Premium SO-04J | Vis-a-Vis (ビザビ) 本店
Roxfit Sony Xperia XZ Premium Pro Impact Gel Shell Case - Clear/Black Reviews
Sony SCSG10 Style Cover Stand for Xperia XZ Premium coming soon
For Cover Sony Xperia Xz Premium Case Anti-knock Heavy Duty Armor Stand Case For Sony Xz Premium Silicon Phone Bumper Case G8141 - Mobile Phone Cases & Covers - AliExpress