"How to fix whole about device option" için yanıtYou need to rewrite NVRAM area.
"Crash and bootloop after some time" için yanıtProbably you use some application that is incompatible or catch conflict. The OT-6030 ( and double SIM variant OT-6030D ) is well maded ( for price level ) with simple construction phone. Most defects comes from LCD cracking or somethin like. Just one i was catch eMMC fault. Phone can be easy serviced via online One Touch Upgrade S or offline via SP-FlashTool. Don't worry - it's nice phone for about the money.