Hi,
I had a problem of overheating and battery drain. I contacted Sony Support and they advised me to use Xperia Cpmanion to repair the software. After this, I found that the installed Software is slightly different from the previous one. I use two language packs: English and Arabic. Before the repair no problem happened with languages but now when I try to search whatsapp using Arabic language the App crashes and needs restore. The same version and configuration of whatsapp is working normally in other phones: Samsung and Huawei. Also the same version and configuration was working well on Z3 before software repair. It is obvious that the problem is with ArabicLanguage Pack. Does anybody have suggestions?