I bought the phone and did factory reset as previous owner all the infos was still in. Then phone got stuck in bootloop and says:

"Device not working properly"

"Software Problem ohmd"

"Too many reboots"

I have been trying to do googling, but every link and tool seems to be dead. Is there any way to fix this? Its sad as device itself is so mint condition with original glass protector on the screen etc. Also it was working before the factory reset so I am wondering should I give up or is there any chance to get it working and find the programs needed?