"iPhone restore unknown error occurred (66)" için yanıtI work on phones almost everyday. this is an issue i have run into on many phones. none of the repairs would do this. are you trying to get information onto this phone or was it in recovery mode?
"Does this sensor on front camera flex look damaged/wrong?" için yanıtthey are supposed to be shinny. also around the camera it is brown, i dont think it should be brown. looks like it was sun damaged or soaked in coffee.
"Why does it say the storage space is almost full when it's not?" için yanıtbecause samsung still has no clue as to how storage works. they also cant compress any files so that will take up a ton of storage. try going into the settings and then find the device care. just click each thing, i think its storage, memory, and battery. click clean now. if that doesnt solve your problem i dont know what else you could do but call samsung or your carrier.